Chapter 32, Problem S27.2BYB

Summary Introduction

To analyze:

The fossil record supports evolutionary theory.

Introduction:

Fossils are the preserved remains or traces of organisms from the distant past. The fossil record remains first and foremost among the databases that document changes in the past life on the earth. Sedimentary rocks are the richest source of fossils. The fossil record of most major animal groups begins in the cambrian.

Explanation of Solution

Fossil record support the evolutionary theory, for example approximately 2000 species of flies belonging to the gene drosophila are now found throughout the world.

Bones and shells are not easily decaying because dead animals and plants can be preserved in peat bogs, amber, tar pits. These become covered from the sediment layer which is remain founds in rocks.

Fossils are found in oldest rocks and more complex fossils found in the newest rocks so this theory support the Darwin‘s evolution theory is that simple life evolved from complex life.

Fossils record provides an evidence of the past life,and give information about how much life evolved on earth.

Conclusion

Thus, Fossils record gives the information about the present animal have evolved from previously existing ones by the process of continuous evolution.