Question

Define homologous organs ?
explain them with example .
how do they provide evidence for
evolution??

Answer 1

• Homologous organs have the same basic structure and origin but perform different functions
• e.g. the forelimbs of a bird,frog and a human have same basic structure but perform different function like birds use them to fly,frogs use them to jump and human uses them to grasps things.
• They provide evidence for evolution as they show the common ancestry by having the same structures.so this show that all these have evolve from the common ancestor.

Answer 2

Homologous Structures. A homologous structure is an organ, system, or body part that shares a common ancestry in multiple organisms. ... In evolutionary biology, this is evidence for descent with modification from a common ancestor. For example, check out the forelimbs of four modern vertebrates.