Abundant light and constant nutrient input make ________ among the most productive ecosystems on Earth
A) streams B) lakes C) estuaries D) bogs E) fens
C
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The Delaney clause of the FFDCA became increasingly problematic because
A) of the introduction of new pesticides. B) organic farming required the elimination of all traces of pesticides from certified organic products. C) more sensitive analytical chemical techniques could detect previously unknown traces of pesticides. D) humans appear to be more and more sensitive to carcinogenic compounds.
If a country is experiencing a negative net migration rate, then
A) more people are moving to the country than leaving it. B) the number of people leaving the country is equal to the number moving there. C) more people are dying in the country than are being born. D) more people are leaving the country than moving to it. E) a negative net migration rate does not tell us anything.
Which of the ethical traditions best describes the building of the Hetch Hetchy Reservoir as right because it benefited a large number of people?
A) consequence-based ethics B) virtue ethics C) environmental ethics D) duty-based ethics E) utilitarianism
The main component of photochemical smog is the gas____________________
Fill in the blank with correct word.