Question

What situation is an example of artifical selection? A) Female bluegill fish prefer to lay their eggs in the nests of larger male fish. B) Albino deer or rabbits have a low survival rate in nature, because it is easy for predators to spot them. C) Penguins with higher body fat tend to survive nesting in the Antarctic winter, while leaner penguins often die. D) More African elephants today naturally lack tusks compared to the elephant populations 100 years ago, because big game hunters sought elephants for ivory.

Answer 1

 I think the answer is D, because elephants are losing their tusks due to people, not nature. People are doing this to elephants, so its artificial selection. 

Answer 2

Answer:

The most appropriate answer would be option D.

Artificial selection is a man-made selection (instead of nature) of organisms or breeds for interbreeding in order to produce an offspring with desirable characters.

The process of artificial selection also introduces new mutations, change in allele frequencies or phenotypes and evolution in the natural world.

For example, 100 years ago, most of the elephants with tusks were killed by hunters for ivory, that is, they were selected by humans not nature. Thus, elephants which lacked tusks had more survival rate due to which the phenotype got incorporated into the population.

Consequently, African elephants naturally lack tusks.