Explain the importance of fossils in deciding evolutionary relcitionships.
Fossils help us to know the following: (a) Fossils help to trace the racial history of organisms. (b) They help to measure the geological time, (c) Older fossils lie at the depth and young fossils are at the upper surface of the earth. Complex organisms are present at top and simple organisms are present at the bottom. (d) Fossil like—Archaeopteryx-show the link between two different types of species.
