7. The functions of cell division
(a)
(c)
(b)
(a) Amoeba : reproduction
(b) Multicellular organisms: growth and
development
(c) Mature multicellular organisms:
renewal and repair of tissues
7
106. 1stand 2nd polar
bodies
male pronucleus
(n)
a.
Sperm Enter Egg
female pronucleus
(n)
c.
female pronucleus
replicating its DNA
b.
Beginning of
first division
d.
male pronucleus
replicating its DNA
Fusion of nuclei
from egg and sperm
106
118. Development of multicellular organisms
• Fertilization
• Embryonic development
• Larval development (metamorphosis)
• Maturation of individual (gametogenesis)
• Aging
• Death
118