Angiosperms have a much higher water-transport capacity than that found in tracheid-only plants because:
A. the thinness of tracheids in angiosperms
enhances their transport capability.
B. the thin leaves of angiosperms allow them
to transpire at a greater rate, moving more
water.
C. the specialization of cells into vessel
elements and fibers allows transport and
support to become separate functions.
D. xylem in angiosperms is composed of
living cells.
E. the thin diameter of angiosperm vessels
increases the rate of water flow.
C
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A patient was involved a serious accident and lost a large quantity of blood. In an attempt to replenish body fluids, distilled water—equal to the volume of blood lost—is added to the blood directly via one of his veins
A patient was involved a serious accident and lost a large quantity of blood. In an attempt to replenish body fluids, distilled waterâ€"equal to the volume of blood lostâ€"is added to the blood directly via one of his veins. What will be the most probable result of this transfusion? A) It will have no unfavorable effect as long as the water is free of viruses and bacteria. B) The patient's red blood cells will shrivel up because the blood has become hypotonic compared to the cells. C) The patient's red blood cells will swell and possibly burst because the blood has become hypotonic compared to the cells. D) The patient's red blood cells will shrivel up because the blood has become hypertonic compared to the cells. E) The patient's red blood cells will burst because the blood has become hypertonic compared to the cells.
"Plaque-busting" drugs are called
a. antibiotics. b. antihelminthics. c. statins. d. antineoplastics. e. antihypertensives
When whole cells or large molecules in solution are engulfed by a cell, this endocytosis is specifically termed
A. facilitated diffusion. B. pinocytosis. C. phagocytosis. D. facilitated transport. E. exocytosis.
Which of the following structures is an essential part of most fungal reproductive systems?
A) gametangia B) cellulose C) seeds D) spores