AP BIOLOGY

Detailed explanation-1: -Homologous structures are structures in related species with a common evolutionary origin that have the same form but may hold a dissimilar function.

Detailed explanation-2: -Homologous organs are organs which have similar functions but different origins. The vestigial organs no longer have a purpose in the current form of an organism of the given species.

Detailed explanation-3: -Homologous structures share a similar embryonic origin. Analogous organs have a similar function. For example, the bones in a whale’s front flipper are homologous to the bones in the human arm. These structures are not analogous.

Detailed explanation-4: -Features of animals that have similar structure are classified as homologous if they have a common evolutionary origin, even if they have different functions in different animals.

Detailed explanation-5: -Homologous structures are similar physical features in organisms that share a common ancestor, but the features serve completely different functions. An example of homologous structures are the limbs of humans, cats, whales, and bats.