Chapter 1. Three Types of Selection

Introduction

Animation

Question 1.1

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Correct.
Incorrect.

Question 1.2

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Correct.
Incorrect.

Question 1.3

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Correct.
Incorrect.

Question 1.4

On Island X the plant population contains only two species. One plant species produces only very large seeds, and the other produces only small seeds. There is only one species of bird on the island, and the birds use these seeds as their only food source. Currently there is a wide range of beak sizes within the population of birds as shown in the diagram below. Small-beaked birds are better able to consume the smaller seeds, while large-beaked birds are better at consuming the larger seeds. Birds with intermediate beak size can make use of both seed sizes.

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Correct.
Incorrect.

Question 1.5

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Correct.
Incorrect.

Question 1.6

On Island X the plant population contains only two species. One plant species produces only very large seeds, and the other produces only small seeds. A rare storm blows in a flock of birds of a species never before found on the island. Within this flock there is a wide range of beak sizes as shown in the diagram here.

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Correct.
Incorrect.

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