During times of stress, which one of the following glands stimulates the anterior pituitary to release ACTH?
A) hypothalamus
B) pancreas
C) adrenal medulla
D) posterior pituitary
E) anterior pituitary
A
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Temperate grasslands and temperate deciduous forests are two different biomes that are located in the same latitudes. Which one of the following abiotic conditions is most likely to account for the differences in their community composition?
A. temperature B. precipitation C. sunlight D. soil nutrients E. a rain shadow
Which statement is NOT true about woody stems?
A. Cork cambium produces waterproof cork cells that become bark. B. The vascular cambium is located between the xylem and phloem of the vascular bundles in a woody stem. C. The stem is organized into a central pith, wood, and outer bark. D. Secondary phloem accumulates to form the wood. E. Woody stems contain secondary growth.
Which of the following will bind to the active site of an enzyme?
A) Competitive inhibitor only B) Noncompetitive inhibitor only C) Allosteric inhibitor only D) Substrate only E) Both substrate and competitive inhibitor
Which organic molecules are primarily used to release energy during aerobic respiration?
A carbohydrates and lipids B nucleic acids and lipids C amino acids and nucleic acids D enzymes and carbohydrates