The oval window is indicated by the letter ____
a. A
b. B
c. C
d. D
e. E
ANSWER: c
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In the three-tier Laboratory Response Network, confirmed bioterrorism agents should be sent to which laboratory?
a. Clinical b. Sentinel c. Reference d. National
Which is the correct order of organization in nature, from least inclusive to most inclusive?
a. ecosystem ? community ? population ? organism b. organism ? community ? population ? ecosystem c. organism ? population ? community ? ecosystem d. population ? organism ? ecosystem ? community e. community ? organism ? population ? ecosystem
A plant growth response to mechanical stress, such as rain and contact with passing animals, is known as:
a. phototropism. b. gravitropism. c. thigmomorphogensis. d. a circadian rhythm.
e. thigmotropism.
Is it unusual to find elevated levels of iridium in the geologic layer at the K–T boundary?
a. Yes, iridium is a common metal on Earth but rarely accumulates in a singe layer. b. No, iridium is a rare element on Earth, but geological layers of iridium are not uncommon. c. Yes, iridium is a rare metal on Earth. d. Yes, composition differences between geological layers tend to equilibrate over time.