Animal fossils may preserve hard parts such as shells and bones.
<h3>Are fossils bones? What evidence did plant and animal fossils contain?</h3>
Fossils are evidence of prehistoric organisms (plants or animals) that are at least 10,000 years old. The most common and obvious fossils are the skeletons, bones and teeth of surviving animals, but there are also fossils of footprints and skin marks. Other fossils that are also evidence of past life include leaf marks, footprints and trails, cavities, feces, and root marks.
<h3>What is the evidence for evolution from fossils? </h3>
fossils record the existence of extinct species, indicating that different organisms inhabited the Earth at different times in Earth's history. It also helps scientists reconstruct the evolutionary history of modern species.
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