A passageway shared by the digestive and respiratory systems is the ________

A) sinuses B) pharynx C) larynx D) esophagus


Answer: B

Biology & Microbiology

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Which of the following statements about infanticide

is true? a. It may decrease the reproductive success of the male lion that carries it out. b. It occurs in very few human cultures. c. The presence of a male unrelated to a child in an American household and the absence of the biological father significantly increase the child’s risk of dying by age two. d. A mother might decrease her fitness by infanticide in a situation where resources or social attachments are absent. e. None of these are true.

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Explain why lactose intolerance is considered a variation in gene expression rather than a genetic disorder. What will be an ideal response?

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The primate ancestors, tree-dwelling insectivores, had two distinct evolutionary advantages: grasping fingers and toes, and

A. a complete digestive tract. B. hair. C. binocular vision. D. mammary glands.

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Which of the following occurs in the lungs?

A) Air loses all of its oxygen. B) Oxygen and carbon dioxide move from a lower concentration to a higher concentration. C) Some of the oxygen in the air moves into the blood, and some of the carbon dioxide in the blood moves into the air. D) As oxygen-poor blood travels through the lungs, it releases all of its carbon dioxide. E) Gases move by bulk flow into and out of the blood.

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