A) They are divided equally between terrestrial and aquatic species.
B) Many produce large numbers of gametes to ensure successful reproduction.
C) The behaviours associated with mating are often highly synchronised.
D) The probability of any one egg being fertilized and developing into an adult can be low.
Correct Answer: A
Solution :
[a] Since external fertilisation can only take place in an aquatic habitat, there are no terrestrial animals that use it.
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