Question

Look at the image below. The circled parts are the site of action for certain PGRs. Identify the PGR that would affect the site and choose the correct option.

• A. a - Gibberellin, b - Abscisic Acid, c - Ethylene, d - Auxin
• B. a - Abscisic Acid, b - Auxin, c- Gibberellin, d - Ethylene
• C. a - Auxin, b - Ethylene, c - Gibberellin, d - Abscisic Acid
• D. a - Ethylene, b - Gibberellin, c - Abscisic Acid, d - Auxin

Answer 1

The correct option is A

a - Gibberellin, b - Abscisic Acid, c - Ethylene, d - Auxin

(a) - Gibberellins help in the elongation of the stem by acting on the elongating part of the stem. (b) - Abscisic acid increases senescence and abscission of leaves in plants. (c) - Ethylene promotes fruit ripening. (d) - Auxin promotes rooting in stem cuttings and also functions in xylem differentiation.