Which endocrine gland is directly responsible for the secretion of the glucocorticoid cortisol?
A. adrenal cortex
B. hypothalamus
C. thyroid gland
D. adrenal medulla
E. anterior pituitary
Answer: A
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On a hot, dry day a plant closes its stomata thereby conserving water. Which plant hormone is responsible for the
closing of the stomata?
a. auxin b. gibberellin c. ethylene d. cytokinin e. abscisic acid
Aerobic respiration became established as a result of the evolution of ____
a. the first protocells b. the first true cells c. metabolism d. the nuclear envelope e. the oxygen-producing pathway of photosynthesis
Although cancer may originate in many regions of the body, many patients die from cancerous growth in the lungs, lymph glands, or liver. This is most readily explained as
A. these organs simply being more susceptible to cancer. B. growth anywhere but in these organs is called benign. C. metastasis occurring more commonly in organs that have a filter effect. D. spreading of cancer by angiogenesis. E. proteinase enzymes making cancer particularly damaging to these tissues.
In the ocean or freshwater a bloom is
A. a major increase in the number of planktonic algae. B. the growth of flower-like structures on brown algae. C. an area where oxygen is depleted from the water. D. None of the above is correct.