Q. 3. What are fossils? What do they tell us about the process of evolution?
Fossils are dead remains (may be a part of the organism or the whole organism) of plants, animals, or any other organisms that existed on Earth in the past
Fossils help us in many ways like,
(i) They give great insight into the evaluation. for example, the pattern of fossil distribution gives us an idea of the time in history when various species were formed and extinct.
(ii) They help us in establishing evolutionary relations between present organisms. Example: Archaeopteryx (connecting link between reptiles and birds).
(iii) Fossils provide insights into Earth's conditions during that specific time or era.
(iv) The age of the fossils can be calculated by using carbon dating.