There are multiple lines of evidence that provide support for common ancestry and evolution. Write 3-4 paragraphs describing at least three of them in detail. Provide at least one example for each line of evidence. —— Answer below

There are multiple lines of evidence that provide support for common ancestry and evolution. These include homology, direct observations, and the theory of continental drift.

First off, homology refers to similarities amongst organisms due to common ancestry. This can include any observable exterior features of organisms, such as their limbs or similarities that lie in DNA. For instance, a DNA sequence that has been widely preserved throughout numerous organisms is an approximately 180 nucleotide sequence known as the homeobox that is responsible for dictating the body structures of organisms. Similarities and differences among biological molecules can be used to determine species relatedness.

In addition, fossil records provide visual evidence of evolution. It directly allows us to pinpoint if there are any similar structures amongst organisms and see if there are any vestigial structures from ancestors that remain in organisms. For instance, some of the best-studied fossils are of the horse lineage. Using these fossils, scientists have been able to reconstruct a large, branching "family tree" for horses and their extinct relatives. Changes in the lineage leading to modern-day horses, such as the reduction of toed feet to hooves, may reflect adaptation to changes in the environment.

Lastly, the theory of continental drift. Continental drift justifies certain lines of evolution and common ancestry. For example, in the 1950s, there was a worldwide effort to eradicate malaria by eliminating its carriers. The pesticide DDT was used to kill the mosquitoes. At first, it was highly effective however, over time, the DDT became less effective, and more mosquitoes survived. This was because the mosquito population evolved resistance to the pesticide. Some populations, like those of microbes and some insects, evolve over relatively short time periods and can be observed directly. The theory of continental drift can help us to answer questions and understand the theory of evolution from the scope of location.

In conclusion, there are many ways to find common ancestry and evolution. Using homology, fossil records, and continental drift you can find evidence that supports common ancestry and evolution.