Each cone responds primarily to a single color. What kinds of cones are present in the human retina?
a. Two cones that perceive red or blue light.
b. Three cones that perceive red, blue, or green light.
c. Three cones that perceive orange, green, or purple light.
d. Three cones that perceive red, blue, or yellow light.
e. Four cones that perceive red, blue, yellow, or green light.
ANSWER: b
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between the ____ of two atoms.
a. electrons and protons b. protons c. protons and neutrons d. electrons e. neutrons
Which of the following is not a method of heat sterilization?
A. Autoclaving B. Incineration C. Heating in a dry air oven D. Pasteurization
Sickle-cell anemia is caused by ____
a. an RNA error b. expansion mutation c. deletion mutation d. fragile X syndrome e. a base-pair substitution mutation
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A) It increases. B) It decreases. C) It decreases, then increases. D) It is unchanged.