Which of the following periods belongs to the Mesozoic era?
A) Triassic
B) Cambrian
C) Paleogene
D) Devonian
Answer: A
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Which of the following forces can not act to change the speed of the wind?
a. pressure gradient force b. frictional force c. Coriolis force d. none of the above
Which of the following statements is true?
A) Carbon tetrachloride, CCl4 was once widely used as a degreasing solvent. B) Carbon tetrachloride, CCl4 is both toxic and carcinogenic. C) Dichloromethane CH2Cl2 is currently a widely used organic solvent. D) All three statements are true.
The tendency of the soils to form clumps of soil particles or lumps is referred to as the soil
A. chemistry. B. texture. C. structure. D. fertility.
The tipping point in a neighborhood ________.
A. is the point in time in which the original charter group begins to confront the minority ethnic group in the neighborhood B. is an internal control as it assures the support of its residents and acts as a point of entry in the migration chain C. is an external control used by the charter group to guarantee its superiority D. is when the charter group leaves the neighborhood and relinquishes the area to the one-time minority group