The part of the human brain that controls the sleep-wake cycle is called the
A) nucleolus.
B) cerebral cortex.
C) suprachiasmatic nuclei.
D) substantia nigra.
C) suprachiasmatic nuclei.
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Red blood cells are
(a) erythrocytes. (b) leukocytes. (c) platelets. (d) all of the above.
This graph shows both human birth weight and
newborn infant mortality. The most common birth weight is between seven and eight pounds. Human birth weight seems to be an example of a. directional selection. b. stabilizing selection. c. sexual selection. d. disruptive selection. e. artificial selection.
An inducible operon is usually controlled by:
a. an inducer molecule that keeps it in the "off" state. b. an active repressor that keeps it in the "off" state. c. being active at all times. d. allolactose. e. being turned "off," usually by the end product of the pathway
Staphylococcus aureus is a halotolerant bacteria.
A) True B) False