what are the advantage and disadvantage of external fertilization in a human being
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Advantages of External Fertilization
It results in increased genetic variations.
It produces a larger number of offsprings.
The gametes released can drift and therefore it is easy to find mates.
Disadvantages of External Fertilization
A large number of gametes are left unfertilized and wasted.
Predators and other environmental hazards reduce the chances of fertilization.
The sperm might not necessarily come in contact with the eggs.
The gametes or the zygote dessicate.
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