Why did the first planetesimals form at the outer edge of the nebular disk?
A) The smaller particles were gathered at the outer edge.
B) The heat of fusion was more favorable there.
C) Cooler temperatures favored condensation there.
D) The planetary accretion gravity spun the planetesimal particles to the outer edge.
Answer: C
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Which of the following is true of the G-protein-adenylate cyclase cascade?
A) It is only associated with monoamine messengers. B) It is only associated with peptidergic messengers. C) It is associated with both monoamine and peptidergic messengers. D) It is associated with neither monoamine nor peptidergic messengers.
How is subsidence associated to groundwater?
A. Subsidence occurs when the water table intersects the ground surface. B. Subsidence occurs when groundwater is contaminated. C. Subsidence occurs when aquifer discharge is greater than recharge. D. Subsidence occurs when all the pore spaces in an aquifer are completely filled with water. E. Subsidence is not associated with groundwater.
Which of the following describes cyclonic flow regardless of the hemisphere?
A. It is a counterclockwise flow. B. It is a clockwise wind flow. C. It is circulation around a low-pressure centre. D. It is circulation around a high-pressure centre.
Where is most oxygen located?
A. Mesosphere B. Thermosphere C. Stratosphere D. Troposphere