What do capsules protect bacteria from?
a. osmotic lysis
b. invaders
c. radiation
d. viruses
Ans: d. viruses
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In the rumen, food is quickly attacked by cellulase
A. enzymes produced by microbes. B. archeons. C. enzymes produced by both the ruminant and the microbe. D. enzymes produced by the ruminant.
In contrast to predation, a parasite usually ____
a. does not kill its host b. always kills its host c. is a short-term visitor d. is larger than its host e. does not harm its host
Which of the following examples demonstrates a mutualistic relationship?
a. mycorrhizae b. rhizobia and root nodules c. soil fungus and soil bacteria d. mistletoe and its host e. Both mycorrhizae and rhizobial/root nodules
Which of the following best compares microevolution with macroevolution?
a. Microevolution describes the small-scale evolutionary changes that populations undergo. Macroevolution describes larger-scale genetic changes observed in species. b. Microevolution describes the large-scale genetic changes that populations undergo. Macroevolution describes small-scale evolutionary changes observed in species. c. Microevolution describes the small-scale genetic changes that populations undergo. Macroevolution describes larger-scale evolutionary changes observed in species. d. Microevolution describes the small-scale genetic changes that species undergo. Macroevolution describes larger-scale evolutionary changes observed in populations.