Define fossil. Explain importance of fossils as proof of evolution

Define fossil. Explain importance of fossils as proof of evolution

Ans: 

Definition : The remains of dead plants and animals that lived in the remote past are known as fossils.

Fossils help in the study of evolution in following ways -

i) Fossils exhibit mode of preservation of ancient species.

ii) Fossils establish evolutionary relationship between organisms and their ancestors. 

iii) Fossils establish the geological time period in which organisms existed.