37. Plant Sensation and Response
Tropisms and Hormones
Multiple Choice
Multiple ChoiceThe immediate, direct effect of auxin in cell elongation, according to the acid growth hypothesis, is to __________.
A
increase the hydrostatic pressure in cells, stretching their walls
B
shift the pH and thus activate enzymes that break the hydrogen bonds
C
move water into vacuoles
D
activate the synthesis of new cytoplasm
E
activate ATP-driven proton (H+) pumps
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