Hippopotamuses perform territorial displays that include mouth opening. This is ________ communication.

A. visual
B. chemical
C. tactile
D. auditory


Answer: A

Biology & Microbiology

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Oxygen is mostly transported through the body in which of the following forms?

A) dissolved in the blood B) dissolved in red blood cells C) bound to hemoglobin D) bound to dissolved iron

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The skin serves as which type of defense against pathogens?

A) innate response B) protective immunity C) barrier to infection D) complement E) adaptive immunity

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If a father and a son are both color blind and the

mother is normal, is it likely that the son inherited color blindness from his father? What will be an ideal response?

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The proximate causes of behavior are interactions with the environment, but behavior is ultimately shaped by _____

A) hormones B) evolution C) sexuality D) pheromones E) the nervous system

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