Question
Biology Question on evolution
Which of the following is a pair of homologous organs?
A
pectoral fin of rohu and fore-limb of horse
B
wings of grasshopper and wings of crow
C
lungs of rabbit and gills of rohu
D
wings of bat and wings of butterfly.
Answer
pectoral fin of rohu and fore-limb of horse
Explanation
Solution
Homologous structures have the same embryonic origin and basic structure, though they mayor may not perform the same function. Homologous structures shows that the animal which possess them have commonancestoryandshowevolutionbydivergencefrom the ancestral type. Vestigial organs are those which have ceased to be any use to their possessor but still persist generation after generation in a reduced form. They are retrogressive organs but were well developed and functional in the ancestors.