Which molecule(s) regulate(s) photosynthesis by sensing the metabolic status of the chloroplast and regulating proton
flow out of the thylakoid lumen?
a. ATP synthase
b. chlorophyll a
c. chlorophyll b
d. carotenoids
e. the antenna complex
ANSWER: a
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Before leaving on a trip, you give your favorite houseplant a little extra water and a pinch of plant food. Your trip ends up lasting a few days longer than you originally planned, and when you return, you discover that your plant has wilted dramatically. What happened?
a. The extra water caused its cells to swell, bursting its plasma membranes. b. Overwatering your plant deprived it of the electrolytes that plants crave. c. Your plant dried out before you returned, and it suffered from plasmolysis. d. The plant food inverted the concentration gradient in the plant, dehydrating it.
The mucosa of the digestive tract may have villi as an adaptation
Indicate whether the statement is true or false.
Scientific facts rely on
1.opinion. 2.prediction. 3.verifiable information. 4.critical thinking.
In the pine life cycle, when does fertilization often take place?
a. a few days before pollination b. at the same time as pollination c. a few weeks after pollination d. months to a year after pollination