Which of the following equations represents the total water potential of a plant?
A. ?w = ?p + ?s
B. ?s = ?p + ?w
C. ?w = ?p _ ?s
D. ?p = ?w + ?s
E. s2 + p2 = w2
Answer: A
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The key structural difference between DNA and RNA is
A. RNA is a protein, while DNA is a nucleic acid. B. RNA is a polymer, but DNA is not. C. As their names indicate, DNA contains deoxyribose, whereas RNA contains ribose. Thus, DNA contains a different sugar than RNA. D. RNA is a double helix, but DNA is not. E. All the bases in DNA differ from those in RNA.
Which of the following food chains will allow the most energy to be available for human use?
a. corn ? cow ?humans b. corn ?humans c. algae?minnows?fish?humans d. alfalfa?cow?milk?humans e. corn?hen?eggs?humans
What are the homeostatic effects of angiotensin II after hemorrhage? Choose all that apply.
A. Shuts down kidney activity B. Constricts arterioles C. Minimizes urine production via aldosterone production D. Stimulates production of erythrocytes E. Stimulates thirst F. Removes lactic acid
Which of the following explains why snakes do not have forelimbs or necks?
a. A mutation causes the expression of Hoxc6 to extend into a more backward region of the animal's body. b. A mutation causes the expression of Hoxc8 to extend into a more backward region of the animal's body. c. A mutation causes the expression of Hoxc8 to extend into a more forward region of the animal's body. d. A mutation causes the expression of Hoxc6 to extend into a more forward region of the anim