what is life and scientific method (talk1)

Biology Today (BIOL 109) Biology with an Issues approach

What is Life? ,[object Object],[object Object],[object Object],[object Object]

Scientists at work ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

The Scientific method ,[object Object],[object Object],[object Object],[object Object],[object Object]

The Scientific method ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Why do Experiments in Labs? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

The Experimental Approach! ,[object Object],[object Object],[object Object],[object Object]

Scientific theories ,[object Object],Cellular organization Fundamental unit of life is the cell – all living things are made up of cells. Metabolism Living things take up energy-rich materials and give out waste to environment. Some energy fuels life processes some accumulates and is released after death. Selective response Living things respond selectively to stimulation in the environment. Organisms recognize certain chemicals as nutrients while ignoring others.

Scientific theories Homeostasis Living systems have some capacity to change harmful conditions into conditions more favorable to their continuing existence – the conversion of chemical compounds. Growth and biosynthesis Living systems go through phases during which they make more of their own material. Genetic material Living systems contain genetic material (DNA and RNA) to allow inherited traits. Reproduction Living systems can reproduce & pass on genetic material. Population structure Organism form populations. Of these organism capable of sexual processes, a population is all those organisms that can interbreed with one another.

Paradigms ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Paradigm Shifts ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],NEW PARADIGM Darwinism (since 1859) Classical Mendelian genetics (since 1865 or 1900) Germ theory of disease (Pasteur, Koch, since 1880) Modern evolutionary theory (since 1940) Molecular genetics (since 1950s) Sociobiology (since 1975) Mind–body connections (since 1980s) Pathogenicity as an interaction of pathogen and host (since 1990s)

Science has Improved our Lives! ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Science has also opened up “Pandora’s Box” ,[object Object],[object Object],[object Object],[object Object]

Ethics and Information ,[object Object],[object Object],[object Object]

Ethical thinking ,[object Object],[object Object],[object Object]

Ethical thinking ,[object Object],[object Object],[object Object],[object Object]

Chernobyl Nuclear Disaster ,[object Object],[object Object],[object Object],[object Object]

Ethical thinking ,[object Object],[object Object],[object Object],[object Object],[object Object]

Ethical thinking ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Ethical thinking ,[object Object],[object Object]

what is life and scientific method (talk1)

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