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Characteristics of Auxin

Auxin in plan...

Question

Auxin in plant is not meant for ................

A

Cell elongation

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B

Fruit ripening

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C

Cell division

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D

Inhibit the root growth

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Solution

The correct option is A Fruit ripening
Auxin is a prominent plant hormone which has very important role to play in cell elongation, division, root growth inhibition, apical dominance, phototropic movement, etc. Whereas ethylene is the gas responsible for the ripening of fruits.

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The following experiment was performed to test the effect of auxin on plant growth: Study and answer question.

The auxin was dissolved in a gelatin block; gelatin does not affect the biological activity of the auxin. Several plant seedlings were prepared in a gelatin block; gelatin does not affect the biological, activity of the auxin. Several plant seedlings were prepared as described above and growth was measured every 5 days.

Based on the results of the experiment, one can conclude that the tip of the plant contains ....................

What proves that auxin is necessary for plant growth?

Q. Auxin : Growth of Plants :: _____ : Inhibits growth of plants.

Q.
To test the effect of an auxin on plant growth, the auxin was dissolved in a gelatin block. Several plant seedlings were prepared and growth was measured every five days.

Plant	Growth after 5 days	Growth after 10 days
1	15 mm	29 mm
2	4 mm	9 mm
3	5 mm	10 mm
4	14 mm	31 mm
5	8 mm	20 mm

What proves that auxin is necessary for plant growth?

Q. In the following questions, a statement of assertion is followed by a statement of reason. Mark the correct choice as:
Assertion: Plant growth regulators (PGRs) are very important for plant growth and development.
Reason: Auxins do not induce flowering in gymnosperms.

Q. Name the synthetic auxins used for inducing the rooting in woody plants.

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Characteristics of Auxin

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