A plant is exposed to a toxin that blocks ABA receptor sites in the plasma membrane. What is the likely consequence of this exposure?
A. The guard cells will become flaccid and gas exchange will cease.
B. ABA will enter the cells by an alternative route and normal function will be restored.
C. Gibberellin production will increase, allowing the plant to access more nutrients in the soil.
D. The plant will lose excess water through transpiration and suffer dehydration.
E. Oxygen deprivation will trigger the release of ethylene, which will in turn suppress root growth.
Answer: D
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One of the two main angiosperm clades, this group has about 60,000 species that are characterized by
having a single cotyledon and by pollen grains with one groove. Most have parallel-veined leaves.
a. eudicots b. the star anise group c. monocots d. water lilies e. magnoliids
What is the function of the typical root and leaf structural shape?
A. To decrease surface area : volume ratio B. To increase surface area : volume ratio C. To increase growth rate D. To increase longevity
How much of 0.5 M glucose (molecular mass 180) is needed to provide 100 mg of glucose?
A) 1.11 mL B) 0.11 mL C) 100 mL D) 10 mL
ectotherms
What will be an ideal response?