Select all correct descriptions of the limbic system.

A. contains the amygdala and hippocampus
B. integrates our emotions with our higher mental functions
C. contains a number of reflex centers
D. accounts for why eating and sexual behavior seem pleasurable


Answer: A, B & D.

A. contains the amygdala and hippocampus
B. integrates our emotions with our higher mental functions
D. accounts for why eating and sexual behavior seem pleasurable

Biology & Microbiology

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A shift from expected allele frequencies, resulting from chance, is known as

(a) natural selection. (b) genetic drift. (c) mutation. (d) gene flow.

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A researcher examines a piece of oak tree bark under a microscope. He notices many small holes or spaces within his bark sample. What are these areas?

A. stomata B. suberins C. pericycles D. lenticels

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Which of the following is NOT true of passive diffusion?

A. Passive diffusion is the process by which molecules move from an area of high concentration to an area of low concentration. B. Passive diffusion is a spontaneous process. C. Passive diffusion requires the presence of a transmembrane protein. D. Passive diffusion will occur so long as the membrane is freely permeable to the solute. E. Passive diffusion requires no energy.

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