A female fish may lay thousands of eggs at once. Which additional statement about fish is most useful for explaining how fish species can evolve by natural selection?

A. All of the fish eggs are genetically identical with one another and with the female parent fish.
B. The environment cannot support unlimited growth of the fish population, so only some fish eggs will mature to adults.
C. After the female fish lays a clutch of eggs, neither parent tends to or cares for the eggs or offspring.
D. Fish eggs will develop into embryos only if they are fertilized by sperm from the male fish.

Answer:

D

Explanation:

A can't be the answer since there is something called mutation which means even twins can't be 100% the same

B can't be since it has nothing to do with natural selection

C can't be sine as B, it has nothing to do with natural selection

A female fish may lay thousands of eggs at once. The additional statement about the fish which is most useful for explaining that the fish species can evolve by natural selection is that the fish eggs will develop into embryos only if they are fertilized by the sperm from the male fish. Thus, the correct option is D.

Natural selection can be defined as the differential survival and reproduction of the individual species due to the differences in phenotype of the organism. Natural selection is a key mechanism of evolution, the change in the heritable traits or characteristics of a population which take place over the period of several generations.

A female fish may lay thousands of eggs at once. The additional statement about the fish which is the most useful statement for explaining that the fish species can evolve through natural selection is that the fish eggs will develop into embryos only if they are fertilized by the sperm from the male fish.

Therefore, the correct option is D.

Learn more about Natural selection here:

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