Which one of the following statements is true?
A) Natural selection works on variation already present in a population.
B) Natural selection works on non-heritable traits.
C) Individuals evolve through natural selection.
D) Organisms evolve structures that they need.

Question

Quizplus · Accepted Answer

Natural selection acts on variation that is already present in a population, often caused by mutations. It does not create new traits, but rather selects for traits that provide a fitness advantage in a particular environment. B is incorrect because natural selection only acts on heritable traits. C is incorrect because natural selection acts on individuals, but it is the population that evolves over time due to the accumulation of favorable traits. D is incorrect because organisms do not evolve structures that they need, but rather structures that provide an advantage in the environment.

Which One of the Following Statements Is True