2.1 Natural Selection Review

Where the better adapted organisms survive to pass traits along to offspring.

• Evolution
• Natural Selection
• Extinction
• Artifical Selection

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Why are advantageous traits more likely to be passed onto offspring?

• Because they are more likely to survive and reproduce.
• Because they come from dominant alleles.
• Because they come from recessive alleles.
• Because the trait is an acquired phenotype.

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Why might it be helpful for a species to have a lot of variations?

• They can't be seen by predators

• If the environment changes, they might be better able to adapt

• It is helpful in asexual reproduction

• They don't recognize each other

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If a sick person takes an antibiotic but it doesn't kill all of the bacteria causing the sickness, what might explain this?

• Variations in the bacteria allowed some organisms to be less affected by the antibiotic?

• Bacteria cannot be killed by antibiotics

• You cannot cure a bacterial infection

• Bacteria do not cause sicknesses

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The male and female black widow spider look very different. However, we know they are the same species because:

• They reproduce creating fertile offspring

• They reproduce creating infertile offspring

• They cannot reproduce

• They are not the same species

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Another term for Natural Selection is:

• Breeding

• Commensulism

• Communism

• Survival of the fittest

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Adaptations can be:

• camouflage

• ability to survive cold weather

• hunting skills

• all of the above

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Natural selection occurs during the lifetime of a single organism.

• True

• False

Why is the mouse population changing over time?

• The light mice can reproduce more successfully than the dark mice
• The hawks eat more dark mice than light mice because the dark mice taste better
• The hawks eat more light mice than dark mice because they can see the light mice more easily
• The hawks eat more dark mice than light mice because they can see the dark mice more easily

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Definition: adaptation

• inherited characteristic that increases chances of survival
• organisms with traits well suited to their environment survive and reproduce at a greater rate
• a growing population causes a scarcity of resources
• differences in the DNA sequence

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