Question

assignment: unit 5: quiz
assignment score: 0.00%
questions ch05.01 question 1 of 10
1.
2.

1. plants may be made to grow taller by applying the chemical ______.

4.
a. naphthaleneacetic acid
5.
b. gibberellic acid
6.
c. phosphon
7.
d. indoleacetic acid
8.
9.
10.

Explanation:

Gibberellic acid (gibberellin) is a plant hormone that promotes stem elongation, which makes plants grow taller. Naphthaleneacetic acid and indoleacetic acid are auxins (involved in cell elongation, but gibberellic acid is more associated with increasing plant height), and phosphon is not a known plant growth - promoting chemical for height increase.

Answer:

b. gibberellic acid