This is the most abundant gas in the atmosphere:
A) nitrogen.
B) oxygen.
C) carbon dioxide.
D) water vapor.
Answer: A
Environmental & Atmospheric Sciences
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When was the Younger Dryas period?
A. about 1,200 years ago B. about 120,000 years ago C. about 120 years ago D. about 12,000 years ago
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A new fish has been discovered in Indonesia, and given the genus name ________ and species name ________.
Fill in the blank(s) with the appropriate word(s).
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In humans, the maintenance of a warm, stable body temperature around 37 degrees Celsius is
A. the result of feedback regulation of blood pH. B. related to the function of melatonin. C. an example of homeostasis. D. a result of fMRI.
Environmental & Atmospheric Sciences
Most European cities are densely populated
Indicate whether this statement is true or false.
Environmental & Atmospheric Sciences