Which is (are) the principal substance(s) that regulate(s) thigmotropism?
A) auxin and ethylene
B) gibberellin
C) abscisic acid
D) salicylic acid
E) none of these
Correct Answer:
Verified
Q31: Photoperiodism is the _.
A) duration of
Q35: Q53: The absence of which of the following Q55: Which of the following inhibits stem lengthening Q57: Active phytochrome controls Q59: Which of the following terms refers to Q60: Which color of light is most effective Q61: Abscission affects Q62: The aging of a plant is Q63: Every choice below EXCEPT _ is a
A)flowering and seed set.
B)seed germination.
C)stem
A)leaves.
B)fruits.
C)flowers.
D)all of these.
E)none of these.
A)senescence.
B)vernalization.
C)abscission.
D)dormancy.
E)chlorosis.
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