What are the two most common elements in the earth's crust?
A. calcium and magnesium
B. sodium and potassium
C. oxygen and silicon
D. aluminum and iron
Answer: C
Environmental & Atmospheric Sciences
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Where would you find a cold desert biome?
a) Mojave b) Sahara c) Sahel d) Antarctica
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Which is the correct order of Russia leaders after 1991?
A) Putin, Yeltsin, Medvedev B) Yeltsin, Putin, Medvedev C) Medvedev, Putin, Yeltsin
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Which of the following stimulates the enzyme isocitrate dehydrogenase?
A) ATP and NADH + H+ B) ADP and NAD+ C) acetyl CoA D) none of these
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Thermal pollution is harmful to some organisms, but actually helps others survive
Indicate whether the statement is true or false
Environmental & Atmospheric Sciences