How long did it take the human population to double from 500 million to 1 billion?

a. 150 years
b. 300 years
c. 450 years
d. 600 years


Answer: A

Psychology

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Papillae, the bumps on the tongue, each contain hundreds of _____, the organ of taste transduction.

A) glomeruli B) ORNs C) taste buds D) umamis

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The part of the electromagnetic spectrum that stimulates the eye and produces visual sensations is known as _____

A) visible light B) cosmic rays C) ultraviolet rays D) the visual field

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Hypotheses of the form "I expect this would happen if" are associated with:

a. deductive reasoning. b. inductive reasoning. c. theory-driven research. d. deductive reasoning and theory-driven research.

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The sample standard deviation is symbolized by ____

a. df b. ? c. S d. S2

Psychology