Q11 of 167 Page 208

Name two organisms which are now extinct and studied from their fossils.

Two organisms that are now extinct and studied from their fossils are Dinosaurs and Archaeopteryx lithographica.

Dinosaurs are believed to be ancestors of birds. Archaeopteryx is link between reptiles and birds.


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9

Name the famous book written by Charles Robert Darwin.

 10

The forelimbs of a frog, a bird and a man show the same basic design (or basic structure) of bones. What name is given to such organs?

 12

Out of the wing of a bird, wing of an insect and the wing of a bat:

(a) Which two are homologous organs?


(b) Which two are analogous organs?

 13

Why are human beings who look so different from each other in terms of size, color and looks said to belong to the same species