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Give reasons for the following: a. Com...

Give reasons for the following:
a. Compared to internal fertilization the external fertilization is disadvantageous to the animal.
b. Chances of survival of young ones are more in vivparous than in oviparous.

Text Solution

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a. A major disadvantages in external fertilization is that the offspring are extremely vulnerable to predators threatening their survival up to adult hood.
b. Because of proper embryonic care and protection, the chance of survival of young ones is greater in viviparous organisms.
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