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A natural growth regulator is...

A natural growth regulator is

A

NAA

B

Ethylene

C

2, 4-D

D

Benzaldetiyde

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The correct Answer is:
B
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What are growth regulators ? List any two applications of gibberellins.

List five main groups of natural plant growth regulators. Write a note on discovery, physiological functions and agricultural/horticultural applications of any one of them.

Which one of the plant growth regulators would you use if you are asked to : induce growth in axillary buds.

Which one of the plant growth regulators would you use if you are asked to : quickly ripen a fruit.

Which one of the plant growth regulators would you use if you are asked to : 'bolt' a rosette plant.

Which one of the plant growth regulators would you use if you are asked to : induce immediate stomatal closure in leaves.

Which one of the plant growth regulators would you use if you are asked to : delay leaf senescence.

Which one of the plant growth regulators would you use if you are asked to : induce rooting in a twig.

Which one of the plant growth regulators would you use if you are asked to: (a) Induce rooting in a twig (b) Quickly ripen a fruit (c) Delay leaf senescence (d) Induce growth in axillary buds (e) ‘Bolt’ a rosette plant (f) Induce immediate stomatal closure in leaves.

Name the gaseous plant growth regulator.

TRUEMAN BIOLOGY-PLANT GROWTH AND DEVELOPMENT AND PLANT MOVEMENTS -MULTIPLE CHOICE QUESTIONS
  1. Which one of the following is a natural growth inhibitor ?

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  2. Closure of stomata' is brought about by

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  3. A natural growth regulator is

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  4. Abscisic acid controls/ promotes

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  5. Who first suggested presence of growth regulatory chemicals in plants ...

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  6. Banana is natural parthenocarpic fruit due to

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  7. Low concentraion of auxin inhibits growth in

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  8. To secure a good crop of tea leaves from a single healthy plant, the g...

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  9. A hormone used to induce root formation in horticulture

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  10. In plants auxin synthesis. with high concentration occurs in

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  11. Homones are translocated through

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  12. The rosette habit of cabbage can be changed by applicaton of

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  13. Dwarf plants can be obtained with the help of

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  14. Hormone similar to animal steroidal hormone is

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  15. A hormone which can substitute effect of cold treatment and photoperio...

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  16. Which of the following phytohormones replaces female flowers with male...

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  17. Which hormones help in breaking the dormancy of seed ? (a) ABA (b)...

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  18. Bakanae disease in Japan was due to a fungus known as

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  19. From which was zeatin isolated ?

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  20. Which of the following type of phytohormones resemble the nucleic acid...

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