Lab: Natural Selection-Standard Bio 4.2

Question 1

The birds shown above have beaks with three different shapes and sizes. These genetic variations in the beak each appeared initially due to

Revolt · Accepted Answer

mutations.

Question 2

Look at the three beaks. Which flock’s birds have beaks that seem most likely to be able to pierce a piece of fruit?

Revolt · Accepted Answer

Flock X

Question 3

Suppose that a plant disease kills all the fruit. The change could become a on the birds.

Revolt · Accepted Answer

selective pressure

Question 4

Check all possible effects of this selective pressure.

Revolt · Accepted Answer

Flock X may try to eat other foods.; Flock X could migrate in search of fruit.; Flock X could slowly decrease in number.; Flocks Y and Z could benefit and increase.

Lab: Natural Selection-Standard Bio 4.2 Answers

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