Which biome is generally found between the polar ice cap and boreal forests?
a. desert
b. taiga
c. grassland
d. estuary
e. tundra
ANSWER: e
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Microorganisms may aggregate and glue themselves to teeth to form dental plaque. This is an example of:
A. a biofilm B. a dentifrice C. halitosis D. a dontoid layer E. annealed enamel
Which body feature in birds is a necessity to allow powerful flight muscles to operate?
a. a beak b. hollow, light-weight bones c. a cloaca d. an enlarged sternum with a protruding keel to bones of the upper limb. e. keen eyesight
If an owl and a hawk both eat mice, what is the relationship between a hawk and an owl?
A) predation B) competition C) mutualism D) parasitism
For individuals planning a trip to another country, such as Vietnam, which organization is the best source for information on which vaccines might be necessary?
a. Centers for Disease Control and Prevention b. National Institutes of Health c. National Safety Council d. Tourist Travel Bureau