The "wall-loosening factor" present in the cell wall of plants is now believed to be
A) auxins.
B) cellulose-digesting enzymes.
C) starch-digesting enzymes.
D) acid-activated expansins.
E) calcium ions.
Correct Answer:
Verified
Q56: Gravitropism would not be observed in a
Q57: In their experiment with grass coleoptiles, Charles
Q58: The plant hormones called auxins do not
Q59: Refer to the figure below showing the
Q60: Auxin polar transport goes
A) from shoot tip
Q62: Which of the following is not involved
Q63: Refer to the figure below. 
Q64: Radishes provide a good demonstration of the
Q65: If a mutant plant were created that
Q66: Florists use silver thiosulfate to
A) delay abscission
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