Human viruses that have appeared suddenly or have only recently come to the attention of medical scientists are called _____________.
A. retroviruses
B. bacteriophages
C. emerging viruses
D. viroids
C. emerging viruses
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A potential consequence of continued human population growth could be which of the following?
a. Humans change from exponential to logistic growth patterns. b. Carrying capacity of the planet will increase. c. Life expectancy decreases as resources become limited. d. Life expectancy increases as resource become more abundant.
A kilowatt, a unit of electrical power, is
a. 10 watts. b. 100 watts. c. 1000 watts. d. 1,000,000 watts.
Scrubbing or immersing the skin in chemicals to reduce the numbers of microbes on the skin is ________.
A. sanitization B. disinfection C. degermation D. sterilization
Chloroplasts are composed of membranous sacs called ________ that carry chlorophyll. Surrounding these sacs is a ground substance called the ________.
Fill in the blank(s) with the appropriate word(s).