Steppe soils are usually low in organic matter
Indicate whether the statement is true or false
F
Environmental & Atmospheric Sciences
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The H1N1 virus outbreak that circled the world in 2009 first arose in ________
A) birds B) humans C) mosquitoes D) pigs
Environmental & Atmospheric Sciences
Which of the following is the best way to classify cytokines?
A) their mode of action B) their origin C) their structure D) their target
Environmental & Atmospheric Sciences
The tendency of producer services to cluster in large urban areas is explained in large part by agglomeration economies
Indicate whether the statement is true or false
Environmental & Atmospheric Sciences
During the spring equinox in the northern hemisphere, the circle of illumination passes directly through the:
A) Tropic of Cancer. B) Tropic of Capricorn. C) poles. D) equator.
Environmental & Atmospheric Sciences