What is thprincipal substancthat causes phototropisin stems or leaves?
A) auxin
B) gibberellin
C) abscisic acid
D) ethylene
E) all of these
Correct Answer:
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Q6: Perhaps a plant's greatest liability is its
Q57: Bananas arpropagateby
A)grafting.
B)adventitious roots.
C)tissue culture.
D)treating banana tissues with
Q58: Fleshy fruits, such as cherries, armorlikely to
Q59: Which of thfollowing statements is FALSE?
A)The movement
Q60: Thseeds of colorful, fleshy fruits armost likely
Q61: Thplant hormonthought to binvolvewith responsto gravity anlight
Q63: Thplant hormonthat stimulates senescencis
A)auxin.
B)gibberellin.
C)cytokinin.
D)abscisic acid.
E)ethylene.
Q64: Thplant hormonthat promotes cell division is
A)auxin.
B)gibberellin.
C)cytokinin.
D)florigen.
E)ethylene.
Q65: Which of thfollowing is mismatched?
A)cytokinin-retards aging
B)auxin-promotes cell
Q67: A housplant that has been placein thwindow
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