Many organic compounds essential for life do NOT
assemble spontaneously in the presence of
a. high concentrations of hydrogen.
b. high concentrations of oxygen.
c. low concentrations of carbon dioxide.
d. nitrogen.
e. hydrogen sulfide.
Answer: b
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Animals that possess both male and female sexual organs
a. are parthenogenetic and typically self-fertilize. b. are hermaphroditic and typically self-fertilize. c. are dioecious and typically cross-fertilize. d. are dioecious and typically self-fertilize. e. are hermaphroditic and typically cross-fertilize.
Which of the following is a major risk factor for developing diabetes?
a. geographic location b. obesity c. gender d. exposure to excessive sunlight e. vegetarian diet
Which of the following is not a characteristic of parenchyma cells?
a. They all lack the ability to photosynthesize. b. They can differentiate into other kinds of cells in response to an injury to the plant. c. They may contain various storage materials, such as starch grains, oils, or water. d. They must be living cells in order to function. e. They may secrete substances of various types.
Which of the following does NOT cause pneumonia?
a. Legionella b. Haemophilus c. Mycoplasma d. RSV e. Histoplasma