GEOLOGY

Detailed explanation-1: -Fossils document the existence of now-extinct species, showing that different organisms have lived on Earth during different periods of the planet’s history. They can also help scientists reconstruct the evolutionary histories of present-day species.

Detailed explanation-2: -Fossils are the preserved remains or traces of animals, plants, and other organisms from the past. Fossils are important evidence for evolution because they show that life on earth was once different from life found on earth today.

Detailed explanation-3: -Fossils provide solid evidence that organisms from the past are not the same as those found today, and fossils show a progression of evolution. Scientists determine the age of fossils and categorize them from all over the world to determine when the organisms lived relative to each other.

Detailed explanation-4: -Fossils are direct evidence of evolution. It tells about the life found on ancient earth. By studying fossil records palaeontologists reveal the connecting link between different organisms of the past and present. The fossils present in the different layers of earth determine the age of the organisms.

Detailed explanation-5: -Five types of evidence for evolution are discussed in this section: ancient organism remains, fossil layers, similarities among organisms alive today, similarities in DNA, and similarities of embryos.