Question

What are homologous structures?

• A. Structures which have a common basic structure but perform different functions are called homologous structures.
• B. Structures which do not have a common basic structure but perform different functions are called homologous structures.
• C. Structures which have a common basic structure but perform same functions are called homologous structures.
• D. Structures which have a different structure but perform different functions are called homologous structures.

Answer 1

The correct option is A Structures which have a common basic structure but perform different functions are called homologous structures.

Structures that have a common basic structure but perform different functions are called homologous structures. For example, the forelimbs of reptiles, amphibians, and mammals. though they have a similar embryonic origin but are variously modified to carry out different activities.

Analogous organs have a different basic structure but look alike and perform the same functions. For example, the wings of a bird and the wings of an insect.