Question

Wings of locust, pigeon and bats are the example of

• A. Vestigial organs
• B. Analogous organs
• C. Homologous organs
• D. Exoskeleton

Answer 1

The correct option is A Vestigial organs

Wings of locust, pigeon and bats are the example of vestigial organs.

In humans, the vermiform appendix is a vestigial structure; it has lost much of its ancestral function.

Vestigiality refers to genetically determined structures or attributes that have apparently lost most or all of their ancestral function in a given species, but have been retained through evolution.

Analogous organ: Organs similar in shape and function but their origin, basic plan and development are dissimilar. For example- wings of butterfly bird and bat. Such similarities are because of convergent evolution for adaptation to a common condition. For example- flying.

Homologous organ: Organs dissimilar in shape, size and function but their origin, basic plan and development are similar. For example- forelimbs of frog, reptile, birds and mammals. Such differences are due to divergent evolution or adaptation for varied conditions. For example- leaping in frog, crawling in reptiles, flying in birds, running and grasping in mammals.

Exoskeleton is the external skeleton that supports and protects an animal's body, in contrast to the internal skeleton (endoskeleton) of, for example, a human. In popular usage, some of the larger kinds of exoskeletons are known as "shells".