Question

Match the columns and choose the correct combination.

	Growth Regulator		Action
$\left(a\right)$	Abscisic acid	$\left(1\right)$	Delays leaf abscission
$\left(b\right)$	Ethylene	$\left(2\right)$	Inhibits seed germination
$\left(c\right)$	Cytokinin	$\left(3\right)$	Herbicide
$\left(d\right)$	Auxin	$\left(4\right)$	Hastens fruit ripening

• A. $a-2,b-4,c-1,d-3$
• B. $a-1,b-2,c-3,d-4$
• C. $a-2,b-3,c-4,d-1$
• D. $a-2,b-1,c-3,d-4$
• E. $a-3,b-4,c-1,d-2$

Answer 1

The correct option is A $a-2,b-4,c-1,d-3$

Abscisic acid is a plant hormone. It is also called as stress hormone as its concentration increases during stress condition. During unfavorable environmental condition, it inhibits seed germination and induces seed dormancy. Ethylene is a plant hormone. It is also called as ripening hormone as it hastens fruit ripening in plants. Cytokinin is a plant hormone that induces cell division. It delays the abscission of leaves. A 2, 4-D is a synthetic auxin, a plant hormone. It acts as herbicide as it kills weeds.

Thus, the correct answer is 'a−2,b−4,c−1,d−3'.