LIFE SCIENCE

Detailed explanation-1: -Fossils. Fossils document the existence of now-extinct past species that are related to present-day species.

Detailed explanation-2: -Scientists use the rock and fossil records to organize Earth’s history into a single timeline by using relative dating of the fossils and rocks and telling us what the climate or environment was like.

Detailed explanation-3: -Using recovered fossils, paleontologists have reconstructed examples of radical evolutionary transitions in form and function. For example, the lower jaw of reptiles contains several bones, but that of mammals only one. The other bones in the reptile jaw unmistakably evolved into bones now found in the mammalian ear.

Detailed explanation-4: -First, they provide evidence of evolution. In addition, the discovery of similar fossils on different continents provides evidence of continental drift.