Patterns of Evolution

Question 1

Speciation

Answer 1

the creation of a new species by evolution from a pre-existing species
-Isolation must occur
-gene pools change

Question 2

Extinction

Answer 2

elimination of a species

Question 3

Gradual Extinction

Answer 3

occurs slowly
-ex. climate change

Question 4

Mass extinction

Answer 4

occurs when a catastrophic event changes the environment suddenly

Question 5

Gradualism

Answer 5

slow, constant changes over a long period of time in species
-ex. peppered moths

Question 6

Punctuated Equilibrium

Answer 6

bursts of change followed by periods of stability

Question 7

Divergent Evolution

Answer 7

-different species come from one common ancestor
-new environments caused the differences
-Adaptive Radiation: divergent evolution on a small scale

Question 8

Convergent Evolution

Answer 8

unrelated species get similar traits because they live in similar environments

Question 9

Coevolution

Answer 9

populations form a special relationship and change in response to each other