(N/A) Evidence that evolution of life forms has indeed taken place on Earth has come from many quarters. Fossils are remains of hard parts of life-forms found in rocks.
Rocks form sediments and a cross-section of Earth's crust indicates the arrangement of sediments one over the other during the long history of Earth.
Different sedimentary rocks contain fossils of different life-forms who died during the formation of the particular sediment. Some of them appear similar to modern organisms.
They represent extinct organisms (e.g.,dinosaurs). $A$ study of fossils in different sedimentary layers indicates the geological period in which they existed. The study shows that life-forms varied over time and certain life-forms are restricted to certain geological time-spans. Hence,new forms of life have arisen at different times in the history of Earth. All these are called paleontological evidences.