Question

Which of the following are not pairs of analogous organs?
I. Wings of bats - wings of birds
II. Flippers of penguin - Flippers of dolphins
III. Forelimbs of horse - Wings of bat
IV. Forelimbs of horse - Flippers of dolphins

• A. II, III & IV
• B. III & IV
• C. Only IV
• D. I & II

Answer 1

The correct option is B III & IV

$\bullet$ Homologous organs :
Similar structure , different function
Developmental origin is same
Divergent evolution
Examples :
1. Mouth parts of cockroach, honey bee, butterfly.
2. Forelimb of man, whale, bat, cheetah.
$\bullet$ Analogous organ :
Same function , different structure
Convergent evolution
Not anatomically similar
Example :
1. Wings of a butterfly and wings of a bird.
2. Flippers of penguin and dolphin
3. Eye of an octopus and a mammal ( both differ in retinal position but function is same )
4. Sweet potato( root modification) and potato ( stem modification) - both help in storage of food.