Question

what is the difference between homologous and analogous organs

Answer 1

Hi !

Homologous Organs :-
Homologous organs are those , with same body structure .
The functions performed by them is different.
Their appearances are different.
They  have a common ancestor.

Eg : Forelimbs of humans, reptiles ( they have same structure, and different functions)



Analogous Organs :-

Analogous organs are those , with different body structure .
The functions performed by them is similar (same).
Their appearances are also similar.
They do not have a common ancestor

Eg : Wings of a bat ; and the wings of a butterfly ( same function,different structure)

Answer 2

Homologous organs : Those organs which have the same basic structure but different functions.

Eg. the forelimbs of a frog, a bird and a man seem to be built from the same basic designs of bones , but they perform different functions.

Analogous organs: Those organs which have different basic structure but have similar appearance and perform similar functions.

Eg; the wings of an insect and a bird have different structures but they perform the same function of flying.