Evolution

Front

Some organisms that share a common ancestor have features that have different functions, but similar structures.

Back

homologous structures

Front

What is suggested by the similarity of early embryos of different species of vertebrates?

Back

evolution from a distant common ancestor

Front

Two organisms that are closely related would have

Back

very similar DNA sequence

Front

A farmer's use of the best livestock for breeding is an example of

Back

artificial selection

Front

Which best describes fossils?

Back

They are the preserved remains or evidence of ancient living things

Front

Why don't all living things become fossils?

Back

because environmental conditions have to be just right to prevent decay

Front

What can scientists determine about the evolutionary relationship between species by comparing amino acid sequences for hemoglobin?

Back

It can provide evidence about the relatedness of the different species: if they are more similar they have a more recent common ancestor.

Front

List the 4 closest human relatives based on the biochemical comparison of Cytochrome C amino acid differences.

Back

chimpanzee, gorilla, rhesus monkey, horse

Front

How does comparing homologous structures provide evidence of evolution?

Back

The genes for the body plan and forelimb layout were present in a common ancestral species vertebrates share, thus passed onto all vertebrates.

Front

What do phylogenic trees do?

Back

Help you visualize how species are related.