Suppose that the number of bird species is determined mainly by the number of vertical strata found in the environment. If so, in which of the following biomes would you find the greatest number of bird species?

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#Question id: 4566

#Section 2: Evolution

Which of these naturalists synthesized a concept of natural selection independently of Darwin?

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#Question id: 4567

#Section 2: Evolution

Charles Darwin was the first person to propose

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#Question id: 4568

#Section 2: Evolution

 In Darwinʹs thinking, the more closely related two different organisms are, the

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#Question id: 4569

#Section 2: Evolution

Which of the following must exist in a population before natural selection can act upon that population?

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#Question id: 4570

#Section 2: Evolution

Which pair would probably have agreed with the process that is depicted by this tree?

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#Question id: 4571

#Section 2: Evolution

Evolutionary trees such as this are properly understood by scientists to be