(Left: generation 1; Right: generation 50)

Were the changes in traits from generation 1 to genreration 50 due to a mutation or natural selection? Explain using evidence from Generation 1 and Generation 50.

At Time 1, the Antarctic eelpout lived in warmer water. When land masses moved millions of years ago, the water became colder. Time 2 represents some time after the environment changed. Time 3 represents many generations after the environment changed. Review the histograms below.

Did mutations affect which trait was the most common at Time 3? Why or why not? Add annotations to the histograms to help you answer this question. Then, write an explanation about your annotations below. Use all of these words in your explanation:

CFS:

• accurately identifies the adaptive trait in the environment

• accurately identifies traits based mutations or natual selection

• accurately describes the environment in which a trait is adpative

• accurately describes how adaptive traits become more common in an environment

At Time 1, the Antarctic eelpout lived in warmer water. When land masses moved millions of years ago, the water became colder. Time 2 represents some time after the environment changed. Time 3 represents many generations after the environment changed. Review the histograms below.

Did mutations affect which trait was the most common at Time 3? Why or why not?

CFS:

• accurately identifies the adaptive trait in the environment

• accurately identifies traits based mutations or natual selection

• accurately describes the environment in which a trait is adpative

• accurately describes how adaptive traits become more common in an environment