What does the carrying capacity for moose on the island primarily depend on
a. The number of moose
b. The number of wolves
c. The rate of plant growth
d. All of the above
Ans: c. The rate of plant growth
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An iron ball and a wooden ball of the same size are dropped from a tall tower. Taking air resistance into account, the ball to hit the ground first will be the
A. iron ball. B. wooden ball. C. Both hit at the same time. D. not enough information
Which of the following factors is responsible for keeping a planet's atmosphere close to its surface?
A. pressure B. cloud cover C. gravity D. moisture
In an acidic solution, why is the hydroxide ion concentration lower than it is in pure water?
What will be an ideal response?
A recent change in the typical U.S. density gradient has been
A) the elimination of the gap traditionally found in the center. B) an increase in the extremes between the inner and outer areas. C) an increase in the number of people living in the center. D) a reduction in the differences in densities found within an urban area. E) an increase in the differences in densities found within an urban area.