Question

In a class, students were asked to observe the models/slides/pictures of the skeletons of forelimbs and wings of different organisms. After the observations the students made the following groups of homologous structures. Select the correct group :
(A) Wings of a bird and a butterfly
(B) Wings of a pigeon and a bat
(C) Wings of a butterfly and a bat
(D) Forelimbs of a cow, a duck and a lizard

Answer 1

wings of a bird and a butterfly

Answer 2

(D) Forelimbs of a cow, a duck and a lizard

Explanation:

Homologous structures are organs or skeletal elements of animals and organisms that, by virtue of their similarity, suggest their connection to a common ancestor. These structures do not have to look exactly the same, or have the same function.

Forelimbs of cow, a duck and a lizard are homologous as cow use the forelimbs for walking, duck for flying and lizard for climbing.