A housplant that has been placein thwindow will grow towarthsourcof light becausauxin
A) becomes more concentrated on the illuminated side of the plant.
B) becomes less concentrated on the illuminated side of the plant.
C) becomes more concentrated in the roots of the plant.
D) inhibits the growth of cells on the shady side, so the cells on the sunny side grow faster.
E) is produced only when the sun shines.
Correct Answer:
Verified
Q6: Perhaps a plant's greatest liability is its
Q62: What is thprincipal substancthat causes phototropisin stems
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
Q68: Gibberellins havtheir most dramatic effects
A)on leaves.
B)in ell
Q69: Thplant hormonthat inhibits abscission is
A)auxin.
B)gibberellin.
C)cytokinin.
D)abscisic acid.
E)ethylene.
Q70: Thplant hormonthat promotes fruit ripening is
A)auxin.
B)gibberellin.
C)cytokinin.
D)abscisic acid.
E)ethylene.
Q71: Thplant hormonthat promotes dormant buds in plants
Q72: Which of thfollowing tropisms is thresponsto touch
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