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Fertilization:
After the formation of gametes, fertilization
occurs
...
e external
fertilization and internal fertilization
...
External fertilization occurs
mostly in aquatic environment
...
For external
fertilization, the animals have to release great
number of gametes
...
External fertilization occurs in many
invertebrates and the first two groups of
vertebrate’s i
...
In internal Fertilization, egg cells
are fertilized within the
reproductive tract of female
...
Such animals provide
protection to the developing
embryo
...
The
shall is resistant to water loss and
damage
...
In this case, there is
extra protection to the embryo and
mother also supplies everything
that embryo needs