Your friend does a belly flop into a swimming pool. The stinging pain he feels is most likely due to the
A) pH of the water.
B) surface tension of water (caused by the large number of hydrogen bonds that form between water molecules).
C) hydrophobic nature of your friend's skin.
D) fact that water is a good solvent.
B
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Which organisms would MOST likely be isolated from aerobic growth conditions with acetate and a soil sample heated to 80 °C for 10 min?
A) aerobic or facultative anaerobic acetogens B) endospore-forming bacteria C) hyperthermophilic heterotrophic bacteria D) mycoplasmas
Which of the following statements describes how root meristems differ from apical meristems in plants?
A. Cells in root meristems have determinate growth. B. Root meristems are shielded by a root cap that protects cells from abrasion by the soil. C. Cells in root meristems are adjacent to the zone of maturation. D. Cells in root meristems are stimulated by hormones other than auxin.
What type of cell is shown at letter C?
A) beta cells B) parathyroid cells C) parafollicular cells D) follicular cells
What process resulted in domesticated plants, which make up most of today's crops?
A) biomagnification B) artificial selection C) advantageous evolution D) eutrophication