Final answer:
Fossils provide solid evidence of evolution and show how species have evolved over millions of years. By studying fossils, scientists can determine the age of organisms and their relationships to each other. When comparing fossils, scientists look for similarities and differences in their physical features, known as homologous structures.
Step-by-step explanation:
The Fossil Record
Fossils are the preserved remains of animals, plants, and other organisms from the distant past. They provide solid evidence of evolution and show how species have evolved over millions of years. By studying fossils, scientists can determine the age of organisms and their relationships to each other.
Similarities and Differences in the Fossil Record
When comparing fossils, scientists look for similarities and differences in their physical features, known as homologous structures. These features are morphologically and genetically similar, indicating a common ancestor. For example, the bones in a bat's wing and a bird's wing have homologous structures. By analyzing the fossil record, scientists can identify common ancestry and evolutionary relationships between species.