Which of the following is likely to happen if the CO2 level in the atmosphere exceeds 650 ppm?
A. 70% of all land-based species could go extinct.
B. Fire ant populations would crash.
C. Lodgepole pine populations would explode.
D. Only specialized plants and animals would survive.
Answer: A
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The rate of reaction for the decomposition of hydrogen peroxide to yield water and oxygen is given by the equation: Rate = k[H2O2]. Which of the following is indicated by this equation?
A) The rate of the reaction is unaffected by the concentration of H2O2. B) The rate of the reaction will increase with increasing concentration of H2O2. C) The rate of the reaction will decrease with increasing concentration of H2O2. D) none of these
The open, sunlit surface area of a lake away from the shore is in which zone?
A. benthic B. littoral C. bathyal D. limnetic E. profundal
Clays are the least abundant of all sediments.
Answer the following statement true (T) or false (F)
Polar bears are members of which of the following orders?
A) Carnivora B) Cetacea C) Chiroptera D) Rhenanida E) Sirenia