In the vicinity of 30° north and 30° south, air typically
A) rises, cools, and precipitates.
B) descends, warms, and precipitates.
C) rises, cools, and is dry.
D) descends, warms, and is dry.
D
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Which of the following structures is not matched properly with its function?
A. collecting ducts: selective reabsorption of key electrolytes and solutes B. glomerulus: filtration C. renal tubules: secretion of additional wastes D. ureter: transport of urine to the bladder E. bladder: storage and elimination of urine
Which of the following is the part of the chordate digestive system just posterior to the mouth?
a. pharynx b. neural crest c. oral hood d. notochord e. cranium
What caterpillar saliva-based chemical stimulates a corn plant to release an alarm signal?
A) Methyl salicylate B) Salicylic acid C) Florigen D) Volicitin E) Salicin
When patient tissues are transfected with viruses carrying a needed, normal human gene, the technique is called
A. antisense therapeutic. B. DNA fingerprinting. C. gene therapy. D. cloning.