Question

Four students P, Q, R and S differently reported the following set of organs to be analogous :P. Forelimb of a frog and forelimb of a lizardQ. Forelimb of a bird and forelimb of a humanR. Wings of a parrot and wings of a butteryS. Wings of a bird and wings of a batThe two students who have reported correctly are :(A) P and Q(B) Q and R(C) R and S(D) P and S

Answer 1

Answer:

B) The wing of a butterfly and the wing of a bat.

Explanation:

Organs of organism can be classified either as analogous organs or homologous organs.

Analogous organs are organs that have same shape and function but are dissimilar in their origin, basic plan and development.

Analogous organs arise from convergent evolution aimed at adaptation for a similar function.

Examples of analogous organs:

Wings of birds and wings of insects

Wings of butterflies and wings of bats

Fins of fish and the flippers of a whale

Homologous organs are organs that have different shapes, size and functions but with the same basic plan, origin and development.

Homologous organs arise from adaptation and divergent evolution of organs.

Examples of homologous organs:

Venus fly trap leaf and cactus leaf

Forelimb of man and the flippers of a whale

Forelimb of lizard and the fore limb of a frog

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Answer 2

C) R and S because they have same function but different structure and origin