What are some methods biologists use to determine evolutionary relationships?

Hi. In my Biology class we're learning about the theory of evolution. Could someone list three methods biologists use to determine evolutionary relationships not including biochemical comparison? Also, could you give me cliff notes on how the three methods listed are different from biochemical comparison?





Thanks a lot. %26lt;3What are some methods biologists use to determine evolutionary relationships?
1. Fossil evidence (they see which fossils are more structurally related)


2. Embryology (looking at the embryos of developing young. Pretty much every mammalian embryo looks exactly the same at some point. Scientists study how long in development two embryos remain similar to compare evolutionary relationships)


3. Anatomy (which creatures and body parts look structurally similar? Even though fish and whales both have fins, if you study the anatomy, you realize that the whale actually descended from a wolf like creature)





An example of a Biochemical Comparison would be to study the DNA sequence of two creatures and comparing the similarities and differences.





Hope you find that helpful! Let me know if you still have questions.What are some methods biologists use to determine evolutionary relationships?
There are only evolutionary relationships within any given species, in the sense that they advance to become better at living within their environment.. One species lives it's time on earth until it becomes extinct, there is not a shred of evidence to suggest Evolution jumps the species barrier. That puts the monkey theory in the dustbin where it belongs.