The "stress hormone" involved in stomatal closure during water stress is:
a. abscisic acid.
b. auxin.
c. cytokinin.
d. ethylene.
e. gibberellin.
a
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Which of the following was NOT one of
Darwin's observations? a. Most individuals have an equal chance to survive and reproduce. b. Changes in populations are gradual and take place over long periods of time. c. Members of the same species may exhibit considerable variation. d. Some characteristics are heritable and passed on to offspring. e. Some characteristics afford their possessor a better chance of survival.
Cutting off the tails of mice over several generations should cause the tails of their offspring to become shorter, according to the ideas of which of these scientists?
A. Darwin B. Wallace C. Lamarck D. Lyell E. Cuvier
Although some bacteria have membranes around their DNA, we do not call these structures nuclei because they lack
____.
a. pores b. proteins c. phospholipids d. a bilayer construction e. ribosomes
During cellular respiration:
a) oxygen is used to transport chemical energy throughout the body b) metabolic oxygen is produced c) light is converted to kinetic energy d) ATP is converted to water and sugar e) energy from the chemical bonds of food molecules is captured