Charles Darwin believed that artificial selection was

A) a process completely identical to natural selection.
B) impossible.
C) unimportant.
D) similar in many ways to natural selection.
E) a common phenomenon in nature.


D

Biology & Microbiology

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Smooth muscles can be activated by all of the following except:

A. the somatic nervous system. B. hormones. C. nitric oxide. D. pH. E. stretch of the muscle.

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What is the main purpose of flowers?

A. To attract attention in the landscape B. To attract pollinators C. To attract predators D. To be pleasing to the human eye

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Interbreeding two different species of lovebirds produces offspring unable to build a nest after they mature because they lack the innate knowledge needed to carry the nesting materials. The hybrid offspring do not reproduce, and this limits genetic

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Sometimes after you have been exercising very hard your muscles ache due to the build up of lactic acid. Lactid acid has build up in your muscles because

A. Glucose is being broken down in the absence of oxygen B. Your muscles are burning fat for energy C. Glucose is being broken down in the presence of oxygen D. Your heart is pumping very fast and delivering more oxygen to your muscles than they can handle

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