Pick out the correct statements.
I. Cytokinins especially help in delaying senescence.
II. Auxins are involved in regulating apical dominance.
III. Ethylene is especially useful in enhancing seed germination.
IV. Gibberellins are responsible for immature falling of leaves.

I and III

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I and IV

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I and II

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II and IV

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Solution

The correct option is C
I and II

Statement III and IV are incorrect because ethylene is a gaseous hormone responsible for fruit ripening. Gibberellin is especially useful in enhancing seed germination. Germination of seed is triggered by soaking the seed in water. After imbibing water the embryo secretes gibberellin, which diffuses to the aleurone layer and stimulates the synthesis of several enzymes including $α$ -amylase.
These enzymes catalyze the breakdown of food reserve in endosperm. Abscission (immature falling) of various parts is stimulated by ethylene.

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Similar questions

Q. Pick out the correct statements.
(A) Cytokinins specially help in delaying senescence.
(B) Auxins are involved in regulating apical dominance.
(C) Ethylene is especially useful in enhancing seed germination.
(D) Gibberellins are responsible for immature falling of leaves.

Q. Match the columns and choose the correct option.

I	II
(p) Control of weeds	(i) Gibberellin
(q) Induction of germination	(ii) Cytokinin
(r) Ripening of fruit	(iii) 2, 4-D
(s) Delaying of senescence	(iv) Ethylene

Which of the following are parts involved in the sexual reproduction in plants?
(i) Flower
(ii) Seed
(iii) Fruit
(iv) Branch
Choose the correct answer from below
a (i) and (ii)
b (i), (ii) and (iii)
c (iii) and (iv)
d (ii),(iii) and (iv)

Q. Match the columns and select the correct option.

	Hormones		Functions
A.	Cytokinin	I.	Senescence
B.	Ethylene	II.	Abscission
C.	Abscisic acid	III.	Cell growth
D.	Auxin	IV.	Shoot and root formation

Q. Match the columns and choose the correct combination:

	Column I		Column II
$(a)$	Auxin	$(i)$	Colouring test lemon
$(b)$	Gibberellin	$(i i)$	Cell division test in plants
$(c)$	Cytokinin	$(i i i)$	Avena curvature test
$(d)$	Ethylene	$(i v)$	Dwarf corn test

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Pick out the correct statements. I. Cytokinins especially help in delaying senescence. II. Auxins are involved in regulating apical dominance. III. Ethylene is especially useful in enhancing seed germination. IV. Gibberellins are responsible for immature falling of leaves.

Pick out the correct statements.
I. Cytokinins especially help in delaying senescence.
II. Auxins are involved in regulating apical dominance.
III. Ethylene is especially useful in enhancing seed germination.
IV. Gibberellins are responsible for immature falling of leaves.