Natural selection that shifts the adaptation of an entire population is known as ____
a. stabilizing selection
b. directional selection
c. disruptive selection
d. artificial selection
e. sexual selection
ANSWER: b
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Salivary amylase:
A. starts the chemical digestion of carbohydrates in the mouth. B. starts the chemical digestion of carbohydrates in the stomach. C. starts the chemical digestion of proteins in the stomach. D. starts the chemical digestion of fats in the mouth. E. starts the chemical digestion of proteins in the mouth.
Organisms that must rely on complex, high-energy molecules produced by other organisms for survival are
A) heterotrophs. B) producers. C) autotrophs. D) cyanobacteria. E) denitrifying bacteria.
Secretion of ADH (antidiuretic hormone) from the __________ occurs in response to __________ and causes __________.
a. thyroid gland ... low blood sugar ... kidney blood vessels to constrict b. pituitary gland ... low blood osmolarity ... decreased permeability to water of a kidney's collecting duct c. adrenal gland ... high blood osmolarity ... increased permeability to water of a collecting duct d. pituitary gland ... high blood osmolarity ... increased permeability to water of a collecting duct e. adrenal gland ... low blood pressure ... increased water and solute reabsorption at the proximal tubule of the kidney
Which of the following is a sterilizing agent?
A. ozone B. hydrogen peroxide C. peracetic acid D. dish soap E. peracetic acid and hydrogen peroxide