| Direction: Read the given passage and answer the following questions. Siddhi studied forelimbs of three organisms and described them as follows: |
| Organism X - Long and short bones, covered with muscles, used for running. |
| Organism Y - Long and short bones, covered with feathers used for flying. |
| Organism Z - A layer of a complex chemical with supporting framework which is not made of bones and used for flying. |
A) Analogous, Vestigial
B) Homologous, Vestigial
C) Analogous, Homologous
D) Homologous, Analogous
Correct Answer: D
Solution :
Organisms X and Y are vertebrates. X is a mammal whereas Y is a bird. Z is an insect (invertebrate). Forelimbs of vertebrates are homologous organs, i.e., organs having same fundamental structure but performs different functions. Wings of insects and wings of birds are analogous organs, i.e., organs having similar functions but different in their structural details and origin.
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