Organisms change over time. Some of these changes make no difference to the success or failure of the organism that inherit them; other changes do. Take a group of antelopes in which one individual has longer legs than its siblings. Those longer legs make the individual better at escaping from predators, hence giving it an advantage in the survival stakes. Its descendants inherit this feature and are better able to survive as a consequence. Those longer legs have thus become an 'adaptation' Their evolution means that this particular lineage of ante lopes has adapted to its conditions, thanks to its development of this features. Their evolution means that this particular lineage of ante lopes.

Over the generations, the individual components of the genetic code within a species change, or mutate. So far as we know, mutations many provide no evolutionary advantage at all. They may be disadvantageous, in which case they are weeded out via natural selection; or they may be advantageous, in which case they persist through the generations.

Why do some mutations persist through generations?

They are advantageous to the animal

The correct answer is Option (4) → They are advantageous to the animal