Natural Selection Speciation Lesson

A physical trait favored by an environmental change can be called an

• adaptation

• extinction

• possibility

• mutation

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According to natural selection, light colored tree trunks would favor

• light colored moths

• dark colored moths

• red colored moths

• red and light colored moths

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Genetic diversity in a species makes long term survival of some members

• impossible

• improvable

• more likely

• less likely

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Natural Selection is driven by a change in the environment and survival of the

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When one population becomes split, we refer to this as the populations becoming what?

• isolated

• mixed

• whole

• inverted

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All the possible gene combinations in a population.

• allele

• gene pool

• genome

• mitosis

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____________ believed that those organisms that were best suited for their environment would survive and pass on their beneficial traits to their offspring. 

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Charles Darwin’s observation that finches of different species on the Galápagos Islands have many similar physical characteristics supports the hypothesis that these finches 
 

• have the ability to interbreed.
  have the ability to interbreed.
• acquired traits through use and disuse.
• all eat the same type of food.
• descended from a common ancestor.

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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 organism knew it needed that trait, survives, and passes it on.

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Mutations are important because they bring about

• death of the organism in which they develop

• genetic variation needed for a population to evolve

• benefits for the individual, not for the population

• changes in genotype, but not phenotype

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