Ch. 13 Natural Selection

How well an organism can survive and reproduce in its environment

• fossil

• fitness

• inherited trait

A group of organisms that are closely related and can mate to produce fertile offspring

• population

• crowd

• species

What is survival of the fittest?

• It is where the fittest die out and therefore reproduce and pass on their genes
• It is where the fittest die out and therefore can't reproduce and pass on their genes
• It is where the fittest don't die out and therefore can't reproduce and pass on their genes
• It is where the fittest don't die out and therefore reproduce and pass on their genes

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What is natural selection?

• Your natural fate is decided from birth
• Nature actively chooses who surivives
• Those best suited to demands of environment surivie
• The weakest of a species surivie

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When every organism of a species has died.

• Evolution
• Natural Selection
• Extinction
• Artificial Selection

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The theory of evolution by natural selection means that what is changing over time?

• The inherited traits of a population.
• The acquired traits of a population.
• Hair color and eye color
• Attractive features.

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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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The differences among a species, like different bird beaks, are called

• genes.
• variations.
• traits.
• theories.

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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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Which best describes the role of mutations in natural selection?

• Mutations help an organism to better survive in their environment
• An organism may acquire a helpful mutation by interacting with the environment
• A mutation may result in an adaptive trait that makes an organism more likely to survive and reproduce
• Organisms with certain traits are more likely to win competitions for mutations

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