Evolution: Similarities Between Bone Structures And Scientists

Evolution is supported by the fossil record, and how scientists can see similarities in DNA. To see how organisms are related,scientists can see that they have homologous structures and scientists can look in the fossil record and see common ancestors. When scientists look into the fossil record, they can see how organisms may have evolved. They look further back and see common ancestors. scientists can look at DNA and see how things are similar in other organisms, they can see that things may have had common ancestors and evolved from the same thing. There are also homologous structures, where scientists can see that organisms have similar bone structures and that it is more likely that they evolved from the same thing, than that they evolved separately and had the same kind of hand structure.

In the fossil record, scientists can see how organisms could have evolved because as scientists look further back scientists can see that an organism was different in the past and has changed to adapt to its environment. As scientists look to older fossils scientists can see that they are not as complex as modern organisms so there must have been some time when they began to become more complex. When scientists look at early humans scientists can see that they share traits with us like they could walk on two legs

An example of this is a human arm, batwing, and mouse forelimb, which all serve different purposes but have a similar bone structure (https://www.ncbi.nlm.nih.gov/books/NBK230201/). The similar bone structure means that they all evolved from a common ancestor. With homologous structures; scientists can see animals that have similar bone structures probably had a common ancestor because, it is more likely two organisms had the same ancestor with that bone structure than they both separately evolved to have the same basic arm