Explain the importance of fossils in deciding evolutionary relationships.

Fossils play important role in providing evolutionary evidences because by knowning the age of fossils we can know about the evolution process of an organism. For example, a fossil bird called archaeopteryx that looked like a bird had many other features of reptiles. It had feathered wings like those of birds, but teeth and tail like those of reptiles. Archaeopteryx is, therefore, a connecting link between the reptiles and birds, and hence suggests that the birds have evolved from the reptiles.