Question

disadvantage of external fertilization

Answer 1

The close proximity of egg and sperm in internal fertilization increases the likelihood of a successful reproductive cycle. In external reproduction, animals disperse their gametes through a body of water. ... Many sperm and eggs die before achievingfertilization.

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Answer 2

Disadvantage of external fertilization:

 As fusion of gametes take place in water medium, the chances of syngamy is less in comparison to that in case of internal fertilization.

 A major disadvantage of external fertilization is that the offspring are extremely vulnerable to predators threatening their survival up to adulthood.

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