Evolution Question 82
82. Which one of the following includes all homologous organs?
[1997]
(a) The wing of butterfly, wing of bird, wing (patagia) of bat
(b) The fore limb of frog, wing of bird and fore limb of rabbit
(c) The thoracic leg of cockroach, the hind leg of frog and fore leg of rabbit
(d) The wing of bird, wing of bat and wing of “flying” lizard
Show Answer
Answer : b
Hints & Solution
(b) Homologous organs are the organs having similar structural plan and origin but performing different functions. Analogous organs perform similar function but have different structural and developmental origin e.g. wings of birds, wings of bat and wings of insects are analogous organs.
