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Role of Ethylene

Question 01:E...

Question

Question 01:

Ethylene is used for
(a) retarding ripening of tomatoes
(b) hastening of ripening of fruits
(c) slowing down ripening of apples
(d) Both (b) and (c)

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Solution

Ethylene is a gaseous hormone and is produced by the ripened fruits and also help in ripening of other unripened fruits. Other mentioned functions are not of ethylene.

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Q. Assertion :The most widely used compound as source of ethylene is ethephon. Reason: Ethephon hastens fruit ripening in tomatoes and apples and accelerates abscission in stems and leaves.

Q. Assertion : Ethylene cause climacteric ripening of fruits
Reason : Climacteric fruits show a rise in respiration at the time of ripening.

Q. Collect information about artificial ripening of fruits by ethylene.

Q. Match the columns and choose the correct combination.

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

Q. Assertion :Ethylene induces fruit ripening. Reason: Ethylene is a gaseous hormone.

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Role of Ethylene

Standard XII Biology

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