IB Biology HL D4.1.3 Overproduction and Competition Topic Practice

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Study D4.1.3—Overproduction and competition conceptsOpen the corresponding Concept lesson for explanations, examples and exam connections.

Question 1

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The Atlantic cod (Gadus callarias) is a fish which lays about 5000000 eggs in its lifetime. On average, only two of these eggs survive to become adult cod. How does this promote evolution?

A

All offspring are genetically identical, so become better adapted.

B

Laying many eggs provides food for other species to survive and become better adapted.

C

Some young cod change to become adapted to the environment and survive and pass on their genes.

D

Offspring with favourable variations survive and pass on their genes.

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