How does water move so rapidly across plant cell membranes?
What will be an ideal response?
ANSWER: Aquaporins are channel proteins that allow the bulk flow of water across cell membranes—
a mechanism much speedier than normal osmosis.
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A chronometer is used for:
a. measuring depth. b. measuring speed. c. measuring time. d. measuring latitude. e. measuring longitude.
An organism's response to the changes in the length of night compared to the length of the day is called ________
a. photoperiodism b. phytochromes c. gravitropism d. thigmotropism e. phototropism
The DIRECT yield of ATP from the Krebs cycle is
a. 2. b. 8. c. 32. d. 36. e. 48.
__________ are tiny pores in the epidermis that facilitate the diffusion of carbon dioxide into leaves or
herbaceous stems. a. Stomata b. Guard cells c. Tracheids d. Sclereids e. Trichomes