What is the percentage of oxygen in air?
A. 35 percent
B. 7 percent
C. 71 percent
D. 21 percent
Answer: D
Environmental & Atmospheric Sciences
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Some of the very large species of animals in the ocean, namely whale sharks and baleen whales, feed on plankton. How can they support their large size eating microscopic organisms?
Environmental & Atmospheric Sciences
An area of high pressure circulates counterclockwise in the Northern Hemisphere and is called an anticyclone
Indicate whether the statement is true or false
Environmental & Atmospheric Sciences
Australopithecus sediba is most likely the direct ancestor of Homo sapiens
a. True b. False
Environmental & Atmospheric Sciences
Pigs are especially scarce in ________ regions, such as southwestern Asia and northern Africa
A) predominantly poor B) predominantly Hindu C) predominantly Muslim D) predominantly Baptist E) predominantly rich
Environmental & Atmospheric Sciences