Swamps and estuaries are ecosystems with high rates of net primary production, while grasslands and agricultural lands are lower.
a. true
b. false
Ans: a. true
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The United States Endangered Species Act offers protection only for species located within United States boundaries
Indicate whether the statement is true or false
Describe how ocean currents affect the global distribution of heat and give an example of how they moderate climate
Which of the following structural features is found in all catecholamines?
A) the presence of two hydroxyl group in meta positions on a benzene ring B) the presence of two hydroxyl groups in ortho positions on a benzene ring C) the presence of two hydroxyl groups in para positions on a benzene ring D) none of the above
Which of the following is a social factor that influences population distribution?
A) Climate B) Famine C) Hurricane Katrina D) Taxation E) Migration