Biofilms
A. are a haphazard mixture of bacteria.
B. are a polysaccharide-encased community of microorganisms.
C. may enhance bioremediation efforts.
D. may protect organisms against harmful chemicals.
E.
are a polysaccharide-encased community of microorganisms, may enhance bioremediation efforts, AND may protect organisms against harmful chemicals.
E
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You observe variation in the auditory signal that males use to attract females. Which of the following would be true if the signal is an accurate indicator of male quality?
a. The highest-quality males have the most common form of the signal. b. The highest-quality males have the most extreme form of the signal. c. Male quality is unrelated to signal variation. d. Only the highest-quality females prefer the highest-quality males. e. Females will use multiple signals to identify the highest-quality males.
What was one of the primary results from the Hubbard Brook Watershed Project?
a. Deforestation increases flooding. b. New plant species that absorb less water were discovered. c. Pollution gravely affected the water supply. d. Primary consumers are the most important part of the energy pyramid. e. Trees absorb too much water and are not useful in a watershed area.
The leavening of the bread is due to the CO2 released during__________
Fill in the blank(s) with the appropriate word(s).
Which human body system includes lymphatic organs of the lymphatic network, such as the tonsils and lymph notes?
A) nervous B) cardiovascular C) endocrine D) urinary E) immune