One hormone helps in ripening of fruits and other brings about stomatal closure. They are respectively

ABA, IAA

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C_{2} H_{4}

, ABA

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ABA, ehtylene

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C_{2} H_{4}

, GA

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GA, ABA

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Solution

The correct option is B $C_{2} H_{4}$ , ABA
Ethylene and abscisic acid both are the plant hormones. Ethylene hormone is also called as ripening hormone as it helps in the ripening of fruits. Abscisic acid is also called as a stress hormone. It promotes stomatal closure when insufficient water is available in the soil.
Thus, the correct answer is option B.

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Similar questions

Q. One hormone helps in ripening of fruits while the other stimulates closure of stomata. These are respectively ..................

Q. From the phytohormones given below, identify the pairs which have mutually opposite influence on seed germination, stem elongation and stomatal movement respectively.
(I) IAA (II)

{G A}_{3}

(III) Zeatin (IV) ABA (V)

C_{2} H_{4}

Q. How many sigma and pi bonds are present in
(a)

C_{2} H_{2}

(b)

C_{2} H_{4}

Question 4:

Match the following.
$\begin{matrix} Column~I & Column~II A . I A A & 1. H e r r i n g s p e r m D N A B . A B A & 2. B o l t i n g C . E t h y l e n e & 3. S t o m a t a l c l o s u r e D . G A & 4. W e e d - f r e e l a w n s E . c y t o k i n i n s & 5. R i p e n i n g o f f r u i t s \end{matrix}$
Codes
$\begin{matrix} A & B & C & D & E (a) 4 & 3 & 5 & 2 & 1 (b) 5 & 3 & 4 & 2 & 1 (c) 4 & 1 & 4 & 3 & 2 (d) 5 & 3 & 2 & 1 & 4 \end{matrix}$

Q. Identify the correct pair of combinations.
(i) Zeatin - adenine derivative - overcoming apical dominance
(ii)

C_{2} H_{4}

- indole compound - effective in fruit ripening
(iii) ABA - carotenoid derivative - induction of parthenocarpy
(iv)

G A_{3}

- terpene - bolting in cabbage

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