Fill in the blank: According to the principles of evolution by natural selection, there is ______ among individuals ("virtually universal" within populations).

• variation

• uniformity

• stability

• identity

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Fill in the blank: The variation among individuals is ______.

• inherited

• temporary

• artificial

• irrelevant

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Fill in the blank: Some variants ______ and reproduce at higher rates than others.

• survive

• sleep

• shrink

• hesitate

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Fill in the blank: The consequence of natural selection is ______ (change in frequency of an inherited trait within a population).

• evolution

• mutation

• photosynthesis

• respiration

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According to the slide 'The Nature of Natural Selection', what is the ultimate source of variation on which natural selection (NS) acts?

• Migration

• Mutation

• Adaptation

• Selection

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According to the slide 'The Nature of Natural Selection', NS and Mutation are (generally) ________ processes.

• separate

• identical

• continuous

• dependent

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According to the slide 'The Nature of Natural Selection', mutations are random with respect to the needs of the organism.

• True

• False

Based on the diagram in the slide 'The Nature of Natural Selection', what happens after constant random mutations in a population of bacteria?

• All bacteria die

• Selection for a trait and reproduction

• No change occurs

• The population decreases

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According to the diagram and text, what does natural selection (NS) act on?

• Populations

• Individuals

• Species

• Ecosystems

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Fill in the blank: NS acts on individuals, but the consequences (evolution) occur in _________.

• populations

• cells

• organs

• ecosystems

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