Chemical activity increases and decreases directly with temperature, given equal availability of moisture
a. True
b. False
Indicate whether the statement is true or false
True
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A species whose role in an ecosystem is vital to the abundance of other species in an ecosystem is called a(n)
A. indicator species. B. native species. C. keystone species. D. specialist species. E. nonnative species.
Instructions: Choose one answer from each pair of selections. Natural rain is slightly ACIDIC | ALKALINE caused by the dissolution of naturally occurring carbon dioxide in precipitation
Hurricane warnings
A) are given if a hurricane is expected to make landfall in more than 24 hours. B) are given only for hurricanes exhibiting regular behavior. C) are less accurate now than they were 20 years ago. D) are issued with an eye toward balancing the economic costs of preparing for a hurricane versus the probability the hurricane will actually hit the projected target area.
The fossil record clearly shows that __________.
Fill in the blank(s) with the appropriate word(s).