Which of the following corals were present in Mesozoic reef communities?
a. rudists d. tabulate
b. rugose e. all of the above
c. schleractinian
C
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Qualitative data ________
A) are data that are expressed as numbers and can be tested using statistics B) have variables that have not been properly manipulated C) cannot be replicated D) can be acquired in the detailed examination of personal interviews or observations E) cannot be used to support or disprove hypotheses
Global warming
A) is not supported by evidence from the last two decades. B) is a very complex topic. C) is definitely caused by human-produced agents, not natural climate fluctuations. D) is being dealt with effectively by the world's major countries under the leadership of the United States. E) all of the above
Solifluction is not a serious economic problem because it occurs mainly in unpopulated areas. Indicate whether the statement is true or false
A solution has a concentration of 15 ppm. Which of the following is another way to describe the concentration of this solution?
A) 0.015 ppb B) 0.15 ppb C) 1500 ppb D) 15000 ppb