Gibberellin induces ____
a. plants to bend toward the light
b. cell division in meristems
c. hydrolysis of starch in seeds
d. fruits to ripen
e. more than one of these to occur
ANSWER: c
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T cell receptors on a particular T cell can recognize more than two antigens
Indicate whether the statement is true or false.
The Network of Ecosystem Warming Studies provides evidence that as a result of climate change
A) net nitrogen mineralization has increased. B) soil respiration has decreased. C) plant productivity has decreased. D) their sites have warmed by at least 7°C.
Which of the following undergoes meiosis during the development of pollen grains?
A) Megaspore B) Generative nucleus C) Microspore D) Microspore mother cell E) Megaspore mother cell
The bipolar spindle organized by the centrioles is formed from _____.
A) the remnants produced by the disintegration of the nuclear membrane B) microtubules that grow out of each centrosom C) cylindrical fibers that develop as adjacent nucleosomes interact with one another D) a tubulin assembly center located within each centromere E) actin filaments