What are homologous and analogous organs in plant and animals? Please explain in breif with their pictures.
Those organs which are similar in origin but different in function are known as homologous organs while those organs which are different in origin but similar in function are known as analogous organs.
Thorns of Bougainvillea and tendrils of cucurbita are homologous organs.
Homologous structures in animals
Analogous structure in plants
Analogous structure in animals
- the wings of bird and the wing of insects
- the fins of fish and flippers of whale
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homologous organs have similar structure but different functions . It is called divergent evolution. example: forelimbs of human,bird,bats,reptile
analogous organs have different structure and similar function. it is called convergent evolution. eg: wings of a bird and butterfly. the function of their wings is the same but the structure is different . BUt they at converge at a point that is flight(same function)
HOMOLOGOUS ORGANS -Organs having similar structure and origin but function are called Homolomous organ.
Eg-fore limbs of human ,fore limbs of bats , fore limbs of reptile,fore limbs of bird,fore limbs of horse.
ANALOGOUS ORGANS -Organs having different structure and origin but are similar in function is called Analogous Organ.
Eg- wings of bird,wings of insect.
If u hv NCERT book then the pictures r in page no.-152 and 153 fig.9.8 and 9.9