The slow drifting of sections of the earth's crust, sometimes separating, other times colliding, is known as ________.
A. plate tectonics
B. crust dynamics
C. continental divergence
D. continental convergence
Answer: A
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Which of the following is (are) a sterilizing gas(es) that can be used on heat-sensitive materials?
A. Glutaraldehyde B. Ethylene oxide C. Chlorine gas D. Isopropanol
The ________ rate is the relationship of the number of deaths from a given disease to the total number of cases of the disease.
A. index B. prevalence C. mortality D. morbidity
Which of the following is an advantage of
having a four-chambered heart?
a. only oxygen-rich blood flows to tissues b. blood pressure in the separate circuits is not independently controlled c. two separate circuits are possible d. only with a four-chambered heart are lungs possible e. more than one of these is an advantage to having a four-chambered heart
Humans derive most of their energy from
a. fats. b. carbohydrates. c. proteins. d. nucleotides. e. steroids.