Cells may enter stationary phase because of
A. the depletion of an essential nutrient.
B. the accumulation of toxic waste products.
C. a lack of available oxygen.
D. All of the choices are correct.
Answer: D
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Macromolecules are synthesized by a series of steps. Monomers are systematically added to the growing polymer. From what you have learned about the synthesis of macromolecules, can you suggest why people who are trying to lose weight are asked to drink plenty of water?
What will be an ideal response?
Citing the dangers of rabies-transmission by local populations of bats, a farming community begins a campaign to trap and kill the winged mammals on a large scale. Shortly thereafter, cornfields begin showing substantial and increasing damage to crops. What is the most likely explanation?
a. Installing bat traps caused disruptions to the local water table. b. Infrasonic cries of trapped bats cause corn plants to suffer stress reactions. c. Pests feeding on corn have multiplied without natural predators. d. Bats feed on damaged corn, leaving more room for healthy plants.
Which of the following would NOT be a possible explanation for high chromosome numbers in ferns?
a. Polyploidy d. Increased recombination rates b. Dysploidy e. Homospory c. Selection for increased independent assortment
A bobcat is feeding on a white-tailed deer. It first eats the liver, which is rich in stored sugars. In what form would sugar be stored in the deer's liver?
A. glycogen B. amylose C. glucose D. maltose E. cellulose