Evidence of evolution

Name the 5 types of evidence that support evolution

Homologous structures, Vestigal structures, DNA evidence, Embryological Development, Fossil record.

What is the difference between homologous and analogous structures?

Analogous- shared structures same function different origin. Homologous- parts of body similar in structure different functions.

What does the presence of a vestigial leg bone in whales suggest about the structure of its ancestor

Had functional legs and lived on land, complete and functioning.

how would you determine which animals are more closely related to each other given the DNA or amino acid sequence?

The more similar the DNA is between the 2 animals= closely related, fewer differences= closer evolutionary relationship.

Why is having fossil re odd useful? What are its limitations?

Shows evidence of evolution over time- shows us how species were similar and changed gradually, some traits evolved. Reveals extinct species. Limitations- fossils can be destroyed from natural disasters, GAPS IN THE RECORD (TIMELIME)

What are the two models of speed of evolution?

1- Gradualism: Changes happen slowly and gradually over a long period of time rather than suddenly. 2- Punctuated Equilbrium species after experience long periods of time, little or no significant change punctuated by relatively short period of rapid change. There is a big change in environment. Quick bursts in small populations.