Abscisic acid is an important signal, transported from roots to the stem and leaves during times of water stress, that prevents
A. additional auxin production.
B. ethylene buildup in the stems.
C. leaf drop.
D. phototropism.
E. stomatal opening.
E. stomatal opening.
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What percentage of alleles will be shared by certain siblings due to the law of independent assortment?
A) Monozygotic twins will have no alleles in common. B) Monozygotic twins will have about 50% of their alleles in common. C) Two typical siblings will have about 50% of their alleles in common. D) Dizygotic twins will have 100% of their alleles in common.
Which of these hormones enables us to excrete concentrated urine?
A) Renal diluting hormone B) Homeostatic hormone C) Diuretic hormone D) ADH E) Aldosterone
What is the portion of a dicot seedling below the cotyledons called?
A. Subcotyl B. Hypocotyl C. Epicotyl D. Internode E. Plumule