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Hormones in Plants

Which of the ...

Question

Which of the following phytohormones promote plant growth?

A

Ethylene and abscisic acid

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B

Cytokinin, auxin, and abscisic acid

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C

Abscisic acid and gibberellin

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D

Auxin, cytokinin, and gibberellin

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Solution

The correct option is D Auxin, cytokinin, and gibberellin

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Q. Assertion: Phytohormones are the plant compounds that can promote and inhibit the plant growth.
Reason: There are some phytohormones like auxin, cytokinins which play a role in plant growth and some phytohormones like abscisic acid which inhibit the plant growth.

Q. P, Q, R, S are four major types of phytohormones.

What are P, Q, R, and S?

Q. Phytohormones are chemicals that regulate plant growth. They are signal molecules produced within the plant, and occur in extremely low concentrations. Which of the following are not phytohormones?

Q. Match the phytohormones with their functions. Choose the answer with the correct combination of alphabets.

	Phytohormones		Functions
A	Auxins	p	Breaking seed dormancy
B	Gibberellins	q	Inducing fruit ripening
C	Cytokinins	r	Growth inhibitor
D	Ethylene	s	Root initiation
		t	Promote cell division

Plant growth movements are induced by phytohormones.

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