LIFE SCIENCE

Detailed explanation-1: -Structures that evolve in living organisms that share a common ancestor are known as homologous structures. Analogous structures are those that have evolved separately in different living organisms yet function similarly or identically.

Detailed explanation-2: -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.

Detailed explanation-3: -Structures which have a common basic structure but perform different functions are called homologous structures. For example, forelimbs of reptiles, amphibians and mammals. Yes, they have common ancestor but variously modified to carry out different activities. Analogous organs have different basic structure.

Detailed explanation-4: -Homologous structures share a similar embryonic origin; analogous organs have a similar function. For example, the bones in the front flipper of a whale are homologous to the bones in the human arm. These structures are not analogous. The wings of a butterfly and the wings of a bird are analogous but not homologous.

Detailed explanation-5: -These likenesses in structure, called homologies, are the result of descent from a common ancestor.