Theory Of Evolution Essay

Charles Darwin : The Father Of Evolution Essay
Charles Darwin is widely regarded as the father of evolution because of his extensive work
explaining how species became what we see now. The theory of evolution is the change in
characteristics of species from generation to generation. Through evolution, the earth gains
biodiversity; species begin, change, or die. Using both fossils and living species, scientists are able
to reconstruct a biological tree, grouping similar species together to trace their way back to the last
common ancestor. Through this we can better picture earth's timeline, and the story of life from the
beginning until now to hopefully get a deeper understanding of what it all means. Although evidence
shows that evolution holds true, it does have its opposition. Through the course of this paper, I will
explain the theory of evolution. In the mid 19th century, Darwin had his first ideas about evolution
on a navy ship heading to the Galapagos Islands. These islands are very geographically isolated
and contain many species that are only indigenous there. As Darwin travelled island to island along
the chain, he noticed that the birds had very slight differences in their beaks and other features. This
made him consider, why would these similar birds have such different features? He realized that the
connection is because they lived in different environments, this must be why each species is slightly
different. Darwin decided to do some closer research and found that there were 13 different species of
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Essay about Evidence for Evolution
Evolution and DiversityвЂЁ
Evolution and DiversityThe foundation for the theory of evolution was laid by Charles Darwin
(Rose, n.d.). He developed hypotheses about natural selection which helped scientists develop the
theory. Evolution is a theory and not a hypothesis because evolution has been proven by vast
amounts of scientific data, research, and testing. The definition of a hypothesis is an educated
explanation that needs to be researched and tested but has not yet been proven (Earman, 1984).
There has been no scientific evidence to disprove the theory of evolution. The fossil record is
evidence of evolution. Fossils are often fingerprints of evolution. They help scientists track how
species evolved...show more content...
Many die before they are born or hatched depending on species, while many others don't survive
infancy and ultimately into their reproductive years. A portion of those that reach reproductive age
will never reproduce due to sterility or other factors. This is a part of the natural selection process. It
is often referred to as the, "survival of the fittest" (Frederic, 2011). It is hard to truly estimate
what fraction of offspring will survive to reproduction. There are always obstacles to survival for
an organism. Climate, food, habitat, and illness are just a few factors which affect natural
selection. Ultimately we know that some traits can increase survival rates for individuals such as
their color. We know from Darwin's research that a certain beak length was favorable in finches but
that was also dependent on yearly weather (Petren, 2005). Offspring that possess favorable traits are
more capable of surviving into adulthood and thus reproducing. We know from genetics that there is
an increased likelihood that their offspring would also possess that desirable trait. The population of
individuals possessing the trait would increase as more individuals possessing the trait survived to
reproductive years, and fewer without the trait did not. Natural selection can help prevent a species
from going extinct if they were to face adverse conditions that

Natural Selection Theory Of Evolution Essay
The Theory of Evolution by Natural Selection, originally formulated by Charles Darwin in 1858, is
the manner in which organisms change over time as a product of specific changes in hereditary
physical or behavioral traits. This process provides the organism adaptations that assist and increase
the chance of survival in the environment. (http://www.livescience.com/474–controversy–evolution
–works.html) Today we can partially thank our existence tonatural selection. "Survival of the fittest"
is how organisms adapt and survive to the ever–changing environmental conditions, and those
"fittest" survive.
The most obvious and direct form of evidence of Evolution through natural selection is, the proof
through fossils. Fossils contain plant and animal remains that provide us with a detailed record of
the past and the changes that occur through time. As time has...show more content...
About 35 million years ago, the North American climate changed from wet forests into dry
grasslands. Size, Feet, and Teeth records all show significant evidential changes that occurred over
this climate change period in which horses has to adapt to this plains habitat. The adaptation of the
horse foot from 4 toes to hoof occurred through the lengthening of the middle toes, which were
suited to run on the dry hard land and the side toes disappearing. Eventually the hoof evolved to
become suitable for running on the land while supporting the changes in lengths of bones and
skeletal structure of the limbs to run for long distances at high speeds. Extensive fossils have been
uncovered showing records of the changes with detailed accounts. Evolutionary change over time is
not simple or linear, but provide evidential trends of species when it comes to traits and
characteristics evolving. Today almost all common ancestors from the Equidae family tree are
extinct, while donkeys and zebras are now included in this

Evidence Of Evolution
Nora Lyang
AP Bio Pd. 3
2 January 2016
Evidence of Evolution The theory of evolution is the process how organisms on Earth change over
time by natural selection. The theory of evolution is so widely known that it is almost universally
accepted, except for a few people that think otherwise. For a theory to become so widely known
and established, there has to have been evidence to back it up. The most prominent pieces of
evidence for evolution are often cited as biogeography, homology, analogy, direct evidence, and
paleontology. Each of these pieces of evidence provide indication for evolution. Biogeography is
the study of where life is found and where their descendants were living in the past. Before Darwin,
all scientists believed in special...show more content...
Analogous structures have similar structures, but a different origin. They also have similar functions.
An example of analogy that supports the theory of evolution is speciation. Speciation is defined as
the biological change over time by which new species arrive. Some might wonder how analogous
structures come to be. Different species usually become more alike because of convergent evolution.
For example, two species can live in different but similar environments and need to fill the same
niche in different places on Earth. Because natural selection is the same around the world, the
species will go through similar styles of adaptations. Animals with advantageous adaptations will
be able to pass on their genes through reproduction. Reproduction continues until the advantageous
adaptation is the only one left. Occasionally, the favorable variation can change the structure of
the species. Limbs can be lost, gained, or changed, creating analogous structures in diverse
species that live in similar niches and surroundings, but don't live in the same places. A more
specific example is the similarity between the wings of birds and bats. A widespread adaptation for
many species, the wings of birds and bats are analogous as flight structures. The wings of both
animals have developed by different paths. In bats, the surface of the wing is a membrane without
feathers whereas birds have wings covered in feathers. Although both animals can fly and have
wings, they are different in many other places. Birds and bats just happen to fill the flying niche of
their

The Process Of Evolution And Evolution
Sachs 1
Ella Sachs
Mrs.Jarvis
AP Biology
April 6th, 2015
The Process of Evolution
Evolution is "the process by which different kinds of living organisms are thought to have
developed and diversified from earlier forms during the history of the earth," "Google." Google.
Google, n.d. Web. 11 Apr. 2015.Evolution is the reason there is change in the genetic makeup of a
population, the reason organisms are linked by common ancestors, and evolution is still happening
today because of the constant change in environment. This paper focuses on these subjects within
evolution and will explore all areas of the process of evolution that creates diversity and unity in life.
One key component of evolution is natural selection. Natural selection is a theory, first presented by
Charles Darwin, that is well known across the globe. It is the reason why there is change of genetic
makeup in evolution. Natural selection is caused by the variation between generations, as well as the
survival of different individuals with different combinations of traits. The theory poses that
organisms with characteristics that increase their probability of survival will be given the chance to
produce more offspring. This means that the organism is more "fit". These offsprings are then given
the benefiting characteristic. With time more variation throughout the species will develop. For an
example of why evolution is dependent on natural selection Berkeley College talks about a
population of beetles.

The Theory Of Progressive Evolution
However, the theory of progressive evolution by selection through natural challenges and sexual
preference across geological epochs as argued in the On the Origin of Species (1859)4 was still to
be considered by all reasonable, educated persons as an astounding, unprecedented achievement. In
historical terms, a dividing line has been reinforced between the pre and post–Darwinian worlds,
emphasising the supposed difference between biological guesswork and precise judgement. A sense
of caution and inquiry as well as lively internal debate on implications was not a block to overriding
optimism.
To the Neo–Darwinians, Darwin formed the inexorable foundation of a grand positivist tradition that
included genetics, evolutionary psychology, cross–disciplinary science, political and religious
reform, and natural history. To discard the supposed inherent, historically consistent validity of
Darwin 's "branching"development of species, the factual existence of genetic predisposition to
phenotypical traits, and the creation of different species and genera by natural selection by sex and
natural challenges over vast, climatic geological epochs5 was seemingly to discard confidence in
biology, science, or even the entire history of liberal Western society as a whole according to Larry
Witham6. This marks the general Neo–Darwinian position on Darwinian as inescapably positivist, in
that a sense of societal improvement through "science" is inexorable from it.
Dawkins made the

Darwin's Theory Of Evolution
Michaelangelo Lipford
Mr. hooker
2 p.r.
14 December 2015
Theory of evolution
The theory of evolution by natural selection, first formulated in Darwin's book "On the Origin of
Species" in 1859. It is when an animal changes over time it changes its heritable physical or
behavioral traits. This happens so a species is better suited to live in an environment and to have
more offspring. Evolution by natural selection is one of the best substantiated theories in the history
of science due to is evidence from paleontology, geology, genetics, to developmentalbiology.
The theory has two main points, said Brian Richmond, curator of human origins at the American
Museum of Natural History in New York City. "All life on Earth is connected and related...show
more content...
It can happen many ways like a population to change color or size over the course of several
generations. This is called "microevolution." But over time it can become bigger it can create new
species, known as "macroevolution." Darwin did know anting about anything about genetics or
how much it effects it how things works. That came later, with the discovery of how genes
encode different biological or behavioral traits, and how genes are passed down from parents to
offspring. The incorporation of genetics and Darwin's theory is known as "modern evolutionary
synthesis." The way physical and behavioral changes that make natural selection possible goes to
DNA and genes. When it changes its known as mutations. "Mutations are basically the raw
material on which evolution acts," Pobiner said. Mutations can be caused by random errors in
DNA replication or repair, or by chemical or radiation damage. Most times, mutations are either
harmful or neutral, but in rare instances, a mutation might prove beneficial to the organism. If so, it
will become more prevalent in the next generation and spread throughout the population. So think
of like spider man he was bit by a radioactive spider and instead of getting cancer he changed for the
better. (I am not condoning for you to get by a radioactive spider just avoid radioactivity

Neo Darwinism
The neo–Darwinian theory of evolution is the "modern synthesis" of Charles Darwin's theory of
evolution by natural selection combined with the Gregor Mendel's theory of genetics. This modern
theory of evolution is the connection between genes and mechanisms of evolution, specifically
natural selection. It can also be described as the mechanisms that may lead to the changes in the
frequencies of alleles found in a population. The neo–Darwinian theory proclaims that all living
organisms share a common ancestor and the evolutionary process is gradual. Evolution is mechanised
by natural selection, gene flow, genetic drift and human intervention which results in speciation (the
formation of a new species).
Natural selection, the key evolutionary...show more content...
At this time, practically all Gram–positive infections were vulnerable to the penicillin. However,
today, infections caused by bacterial agents such as Staphylococcus aureus are resistant to penicillin,
and of those, 50% are resistant to stronger drugs. Human actions that have aided and accelerated the
process of evolution regarding bacterial resistance to antibiotics include the misuse of antibiotics by
health professionals (more than 40 million of antibiotic prescriptions in 2011 were unnecessary),
poor drug quality, unhygienic conditions enhancing the spread of resistant bacteria (mostly in
developing nations) and inadequate surveillance (patients not completing their course of antibiotics
and the strongest/resistant bacteria

Evolution Essay
Evolution
Evolution is a complex process by which the characteristics of living organisms change over many
generations as traits are passed from one generation to the next. Many scientists agree on that
concept. They have been trying to develop this theory over hundreds of years to make it reasonable
and beliveable to people. But is evolution the reason that humans are on earth?
People that are not quite religious and have little faith in God believe in evolution. Those who
strongly stand by their beliefs supporting evolution, in my opinion, think they know enough about
science and biology and all the complexities of the cell and the human being that they forgot who
actually created all this. In the Bible, the Quran and most if...show more content...
This is prohibited genetically since all of the information for the development of an organism has
already been encoded in the DNA of its parent. Variation to organisms must remain within its basic
kind...evolutionists have tried to explain that natural selection happened in conjunction with
mutations to the genetic code. This could not produce evolution, however, since mutations do not
create new genetic potential, they just alter what is already there."3 Now genetic alteration, or
mutation is being taken place on animals like pigs and mice to try to have human DNA in their
cells. The chances of this taking place successfully is again very low.
Some evolutionists argue that anti–evolutionists' only sources are either religous or weak scientific
facts. The second law of thermodynamics is broadly accepted by many scientists and states that,
"...anything which is organized , tends with time, to become disorganized. Any physical system left
to itself will decay, or, lose energy and organization within the system...In other words, this law says
that the increase of information required for a life form to evolve could not happen as this increase
in information by itself violates the law."4 This disorganization is also called entropy.
1. http://str.org/free/reflections
"Measurements of the sediment deposited each year as a result of the Nile River's overflow shows
that

The Theory of Evolution
Running Head: EVOLUTION The Theory of Evolution By Student's Name Name of University
Charles Darwin's theory of evolution has been a topic of controversy since it was promulgated in the
late 1800s. Nonetheless, its tenets remain strong, with many modern day scientists making
discoveries that support Darwin's theories of evolution, natural selection, and survival of the fittest.
In The Origin of Species, Darwin calls the process of natural selection or survival of the fittest, the
preservation of favorable individual differences and variations, and the destruction of those, which
are injurious (Darwin, 1901). Darwin's theory of evolutionary change and process of natural
selection surmises that variations exist in every...show more content...
The theory of evolution will always be debated, but new scientific discoveries that support the theory
cannot be disputed. Therefore, Darwin's theory has stood the test of time, which is a great
accomplishment in this ever–changing world of new discoveries and scientific innovations.
References Abdul, P. (2005). Origin of genetic information and evolution of biological species. Islam
& Science, 3, 7–13. Beecher–Monas, E., & Garcia–Rill, E. (2006). Genetic predictions of future
dangerousness: Is there a blueprint for violence. Law and Contemporary Problems, 69, 301–310.
Darwin, C. (1901). The Origin of Species by Means of Natural Selection: Or the Preservation of
Favored Races in the Struggle for Life. New York: P.F. Collier and Son. Griffiths, P. E. (1997).
What emotions really are: The problem of psychological categories. Chicago: University of Chicago
Press. Science and Creationism: A View from the National Academy of Sciences. (1999).
Washington, DC: National Academy Press. Waters, R.H., & Rethlingshafer, D.A., & Caldwell, W.E.
(1960). Principles of Comparative Psychology. New York:

The Theory Of Evolution And Adaptation
There are three major refutations against the design argument, first she designs argument is faulted
for its weak analogy between the natural objects and the objects that that is known to have a creator
such as buildings. This is the equivalent of comparing apples to oranges. For the second refutation
the design argument claims that everything has a perfect design, this simply isn't the case. For
example, we can examine the issues of starvation within the United States, although the world is
structured to perfectly provide food for humans, there still people starving because of imperfect
circumstances such as the inability to transport food to those who can`t receive it themselves (Tombs
7). The strongest and most accepted argument against the design argument is the theory of evolution
and adaptation. Those who support the theory of evolution and adaptation credits the perfect design
of the aspects to those two concepts. Artic Fish are an example of this adaption, they have developed
a protein in their blood that prevent their blood from freezing which allows them continue their
metabolic functions (Lloyd 2). The finally argument against the design theory states that even if the
premise of the argument is true, its doesn't necessarily confirm the existence of God. The third
argument of the existence of God is the ontological argument. Unlike the cosmological and the
design arguments the ontological argument does not attempt to seek evidence with in our physical

Why Do You Believe In The Theory Of Evolution
Introduction
Do you believe in the theory of evolution? There are many people who believe evolution is how
humans came to be in today's world. Charles Darwin was the first to publish work on the theory
in 1859, concluding it is the process by which organisms change over time as a result of changes
in heritable physical or behavioral traits. Over the years scientists have began trying to prove this
theory is real. The theory has two main points, all life is connected and related to each other and the
diversity is a product of modifications of populations by natural selection. Modern scientists have
gone even further to branch off of the theory to make more points of the theory such as natural
selection, origin of species, and modern understanding....show more content...
In today's society there are a strong number of individuals who strongly believe it is true. The
theory is untrue from the majority's point of view. This is because there are no hard facts to
prove we have all evolved from the same specimen. The only type of evolution is how animals
adapt to an environment over time, but to say we all came from the same cell is just not
provable. To see that a lot of people believe in a loosely supported and the theory was created by
man when there was little to no religion. There's more proof in the religion of Christianity than
evolution because of religious sites and the places that are spoken of in the bible are actual cities.
There's nothing but the words of a man that came from his imagination. Charles Darwin made a lot
of valid points but he did not know what modern people know today. Darwin did not know about
DNA and the specifics of each species. If Darwin had all the details of today's scientists, he would
have not believed in evolution.
Conclusion
The theory of evolution is a debatable topic. It can go either way depending on the person, but the
simple fact is that there is no proof to support the theory. Scientists have tried to find any realism in
the theory but it is just too far fetched to have any concrete evidence. It is a personal opinion in
whether someone believes in evolution or not but it is almost more

The Theory of Evolution Essay
The theory of evolution by natural selection does not interfere with the Judeo–Christian view of god
as the creator, based on multiple sources including statements from the Pope himself. Although
throughout history there are many instances of conflict between people, science, and the Catholic
Church, there has recently been a widespread acceptance for science and many even say it does not
interfere with the Judeo–Christian view of god as the creator. This essay will discuss the different
types of views there are on evolution and creation, as well as go in depth to prove how evolution by
natural selection does not interfere with the Judeo–Christian view on evolution. There are many
different views on evolution. The first is scientific...show more content...
(Akin) Galileo was a prime example of a conflict between the Catholic Church and science. He
was a devout roman catholic, however a great scientist. Galileo had many contributions to the
world such as the telescope and his many discoveries in outer space. However one of the more
widely recognized was his support to Copernicus' theory of heliocentricity. Before this the church
had stated that the sun revolved around the earth, known as the theory of geocenctricity. Galileo's
teachings were consequently banned by the church, and Galileo himself imprisoned. However, in
1992 the Vatican under Pope John Paul II held a ceremony to proclaim that Galileo was right in his
findings and support of Copernicus. (Tracts) This shows that the present day church does not see
science as a threat or interference to its teachings. The present day church actually supports science,
as well as the theory of evolution by natural selection. However, although evolution is widely
accepted by many Popes, as well as the Catholic Church, many things are still maintained. It is still
maintained that Adam was the first human and all life originated from him. The church still says
that all humans have souls. The church insists that a soul is unobservable; therefore it is untestable
by science since it has no effect on the natural world, and science cannot confirm or deny its
existence. The big bang theory is

The ongoing scientific investigation of how exactly evolution occurred and continues to occur has
been an argumentative idea amongst society since Darwin first articulated it over a century ago. The
scientific basis of evolution accounts for happenings that are also essential concerns of religion; both
religion and science focus on the origins of humans and of biological diversity. For instance, in the
reading "Truth Cannot Contradict Truth," Pope John Paul II, addressing the Pontifical Academy of
Science, discussed the matter of God as creator of man. The Pope explains that men cannot relate to
animals because men are superior. The reasoning for that is because God created humans under his
likeness. What the church is saying about mankind...show more content...
"If no such variations exist, the population rapidly goes extinct because it cannot adapt to a changing
environment" (O'Neil, 1998–2013). Scientists call this reproductive success. "Within a specific
environment context, one genotype will be better than another genotype in survival or reproduction
for certain reasons having to do with the way its particular features relate to the environment or relate
to other organisms within the population" (Futuyma, 2000–2014). The theory of evolution is
explicable through various kinds of scientific research. In the science of paleontology, the history of
life is studied. Paleontologists study fossils to learn the past ecologies, evolution, and the origins of
humans. In order to understand the processes that have led to both the origination and destruction of
organisms since life began, paleontologists incorporate both scientific knowledge and studies. Fossil
findings are critically important for confirming predictions of evolution theory. Of the many
discoveries that are made yearly to add depth to the understanding of evolution, an example is a
recent discovery of a creature they named Tiktaalik. The Tiktaalik was uncovered to be a transitional
animal between shallow–water fishes and limbed animals. The creature supports the idea that it
emerged from both mammals and reptiles, suggesting that the two are related. These findings
support prediction of evolution, contradicting the belief that God

Charles Darwin 's Theory Of Evolution Essay
Darwin and his Followers Charles Darwin is one of the most well known names in the United
States for good reason. His theory of evolution through natural selection was not only
revolutionary in the scientific world, but were also applied to society by some of his followers in
this country. Some of these applications were beneficial to society while others simply allowed
people to use his teachings for their own goals. While not apparent at first, Darwin does believe in
a meaning in life similar to Tolstoy, and does not have the same pessimism as Freud. However,
Darwin's followers in America do not share the same view, and use his findings to establish
Social Darwinism in their country. This backdrop allows for many racist norms in the name of
science, and allows for the occurrence of cases like that of Henrietta Lacks. Taking a look at
Darwin's The Origin of Species, his wording clearly shows that he is attempting to report his
findings using only facts. In this work, Darwin aims to shed light on the origin of all species, but
is very careful to only mention the origin of man very briefly. This avoidance can be explained by
his fear of public reception to such a controversial new theory on all of life. At the time of his
publication, the english speaking world is dominated by creationists firmly believing that God is
the universal origin of all species. Despite his lack of God in his explanation of the origin of life,
Darwin shows that he does believe in a

Charles Darwin's Theory of Evolution Essay
Before the theory of evolution was a widespread theory in the world of science, Greek and Roman
philosophers had their own theories about how life came to its present state and where it was
going from there. One theory at the time was that all organisms are reflections of a "perfect" form
and were coming closer to it all the time, although this was the less accepted theory even though it
was closer to the truth proven hundreds of years after, while another was that all things were simply
places on Earth in their present form, common to modern day Creationism. Even after this, Darwin
was not the first to try explain evolution, he just provided convincing proof and published his ideas.
The publishing of Darwin's Theory of Evolution was...show more content...
While on the GalГЎpagos Islands, Darwin kept notebooks about all the species there, and he
noticed the variety of tortoises on the island who were essential in explaining his theory of
evolution. There are several species of tortoise present on the GalГЎpagos Islands that are all very
closely related, but slightly different. There are eleven presently surviving subspecies of
GalГЎpagos tortoises; furthermore, six of the eleven are found on different islands in the
archipelago, and the other five are all found on a single island on five separate volcanoes with their
own mini–ecosystems (PNAS). Although all of the species of GalГЎpagos tortoise is different, they
each have small differences that can include maximum adult size, shell shape, and the length of the
neck and limbs. The tortoises of the islands are most closely related to the Chaco tortoises along the
western coast of South America, and they most likely came to the GalГЎpagos by "rafting" across
the water (PNAS). Similar to the tortoises, Darwin observed that the Finches on the islands also had
changed to match the environment. Spread among the islands were fourteen subspecies of finch
whose

What Darwin Never Knew Essay
Evolution– What Darwin Never Knew
The main claims of evolution are that all species are connected, species change, and that genes of
different species are not identical due to mutations. PBS's film, What Darwin Never Knew, explains
that "all species are connected and they change through Darwin's 'descent with modification' theory"
(What Darwin Never Knew). The species are connected, yet varying through mutations. "Mutations
are a critical ingredient in the recipe for evolution. Without mutation, everything would stay
constant, generation after generation. Mutation generates variation, differences between individuals"
(What Darwin Never Knew). In different species, most of the DNA is similar, with the exception of
one different sequence. The mutations can cause changes between species, causing variation.
Overall, it...show more content...
He did not know that DNA does not stay the same and that mutations change DNA. Evolution is
discovered by the comparing of genes. Similarly, Darwin did not understand dark matter, a
concept still hard to grasp today. Otherwise, one other major contributing point is switches in
DNA. "Switches are very powerful parts of D.N.A., because they allow animals to use genes in
one place and not another; at one time, and not another" (What Darwin Never Knew). Darwin was
born in the 1800's, whereas it was not until the 1950's that Watson and Crick began to decipher
DNA's structure. Darwin's claims still hold true, but DNA takes evolution one step forward.
Darwin's ideology and today's knowledge of DNA work hand in hand to ensure the development and
understanding of evolution. Through this, I have learned about evolution. I find it shocking that one
DNA sequence is what differentiates certain species from others. I have learned about switches,
which takes a big role in the makeup of organisms and its diversity. Between Darwin's knowledge
and today's knowledge, I am beginning to make connections about

Charles Darwin's theory of evolution centres on the idea that species compete to survive, and
favorable characteristics are passed on from one generation to the next.
Darwin said that evolution took place by a process of natural selection or survival of the fittest. This
meant that the animals and plants best suited to their surroundings survived and were able to pass on
their genes to their offspring. The ones that weren't best suited died off and didn't get the chance to
reproduce. Animals and plants had to change or evolve due to environmental pressures. Over
millions of years the conditions on the Earth have changed tremendously, the environmental
conditions we have now are very...show more content...
Darwin noted four things from his observations:
1. All organisms produce an abundance of offspring, many more than is necessary
2. There is a fairly constant population size over time for any particular organism
3. Within a species there is a wide range of features, due to different alleles
4. Some variations are passed on and inherited by the offspring
From these Darwin decided that all organisms struggle for survival and so have to produce many
offspring to ensure that some do survive.
He also concluded that for a species to survive, the best (or 'fittest') of them must survive long
enough to reproduce and pass on their genes.
It has three essential parts:
It is possible for the DNA of an organism to occasionally change, or mutate. A mutation changes the
DNA of an organism in a way that affects its offspring, either immediately or several generations
down the line.
The change brought about by a mutation is either beneficial, harmful or neutral. If the change is
harmful, and then it is unlikely that the offspring will survive to reproduce, so the mutation dies out
and goes nowhere. If the change is beneficial, then it is likely that the offspring will do better than
other offspring and so will reproduce more. Through reproduction, the beneficial mutation spreads.
The process of culling bad mutations

Biological evolution is the name for the changes in gene frequency in a population of a species from
generation to generation. Evolution offers explanation to why species genetically change over years
and the diversity of life on Earth. Although it is generally accepted by the scientific community,
Charles Darwin's theory of evolution has been studied and debated for several decades. In 1859,
Darwin published On The Origin of Species, which introduced the idea of evolutionary thought
which he supported with evidence of one type of evolutionary mechanism, natural selection. Some of
the main mechanisms of evolution are natural selection, mutation, and genetic drift. The idea that all
life on Earth shares a common ancestor has been around for...show more content...
Over time the beak would become longer and those birds would survive. The next mechanism,
genetic drift, happens by chance. For example, a bug that is either red or green. If a large portion
of the red bug happens to get stepped on, the gene frequency for this species is now changed.
Mutation is another evolutionary mechanism that happens by chance. Mutation is when the
genetic material of an organism is altered. An example of this is albinism which has altered the
genes of several different animals. Evolution has been debated for many years. Most scientists
assume evolution to be true, but it is not officially proven. Evolution is known as "fact and
theory," because it is a fact that organisms have changed over time, but the mechanism that
changes those organisms is uncertain. One of the major debates regarding evolution is the belief
in creationism. Creationists believe that the Universe and organisms on Earth were all created by
a divine power. There are also some theories in which creationism and evolution coexist. One idea
is that the divine being who created the world used evolution as a method. Another idea is that
science and religion are actually the same thing and religion explains the unknown parts of science.
For example, science says that the world couldn't have been created in seven days, but one of God's
days may not be the same length

Theory Of Evolution Essay

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Theory Of Evolution Essay