Lab: Natural Selection

Question 1

How does nature “select” phenotypes, such as bird beaks? Check all correct explanations.

Revolt · Accepted Answer

Traits that suit the environment enable an organism to reproduce in greater numbers.; Traits that do not suit an environment make it harder for an organism to stay alive and reproduce.

Question 2

beak distribution between generations 1 and 2.between generations 2 and 3.between generations 1 and 3.✔ when fruit was removed.

Revolt · Accepted Answer

when fruit was removed.

Question 3

Below is a list of possible challenges. Check all errors that you mentioned in your answer.

Revolt · Accepted Answer

Traits other than beak type might affect natural selection.; It could take many generations to observe adaptions to a population.; The environment may be complex and hard to study.; Changes in the environment may occur faster or slower than changes to the birds; The birds may be interdependent with other organisms that may change, too.

Question 4

There was a change in the environment between generations 10 and 30. The change likely caused a genetic mutation eliminated a recessive trait✔ favored trait Afavored trait B.

Revolt · Accepted Answer

favored trait A

Question 5

Which possible outcome below would not have supported the hypothesis?

Revolt · Accepted Answer

if generation 3 had flock distributions similar to those shown in the graph below

Lab: Natural Selection Answers

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