Front

What are homologous structures?

Back

Structures that share a common ancestry or are similar because they are modified versions of structures from a common ancestor, containing the same basic bone structure.

Front

What are vestigial structures?

Back

Structures with no function that are remnants of an organism’s evolutionary past.

Front

What does the presence of vestigial pelvic bones in baleen whales indicate?

Back

It provides evidence that whales descended from four-legged animals.

Front

Which animal shares the fewest amino acid differences with humans?

Back

Chimpanzees.

Front

What does embryonic development reveal about evolutionary history?

Back

The evolutionary history of organisms is seen in the way embryos develop.

Front

What is the significance of homologous structures in evolution?

Back

They provide evidence for common ancestry among different species.

Front

What is an example of a vestigial structure in humans?

Back

The appendix.

Front

How do scientists use comparative anatomy to study evolution?

Back

By comparing the structures of different organisms to identify similarities and differences that indicate evolutionary relationships.

Front

What is the role of DNA in providing evidence for evolution?

Back

DNA comparisons can show genetic similarities and differences that reflect evolutionary relationships.

Front

What is the concept of natural selection?

Back

The process by which organisms better adapted to their environment tend to survive and produce more offspring.