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During water stress and drought conditio...

During water stress and drought conditions……...causes stomatal closure.

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stomatal closure
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_________ induces stomatal closure

Assertion (A): ABA plays an important role in plants during water stress. Reason (R): ABA promotes stomatal closing during water stress.

How ABA involves in stomatal closure.

During water stress conditions, the special cells that help in the rolling and unrolling of leaves there by avoid water loss is ________ .

Comment on various chemicals inducing stomatal closure.

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.

Assertion: Adrenal medullary hormones help in combating the stress condition. Reason: Both adrenaline and noradrenaline act on same organs and produce similar effects.

Assertion: During unfavourable conditiions, the fresh water sponges disintegrate, but the gemmule can withstand adverse conditions. Reason: Gemmules are hard balls consisting of an internal mass of food laden archaeocytes.

Fill in the blanks: (i) _____causes stomatal closure. (ii) The growth and functions of thyroid gland is controlled by_____.

SURA PUBLICATION-PLANT AND ANIMAL HORMONES-ADDITIONAL QUESTIONS & ANSWERS (FILL IN THE BLANKS)
  1. The chief cells of parathyroid glands are…………….

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  2. The function of control and coordination in plants is performed by che...

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  3. During water stress and drought conditions……...causes stomatal closure...

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  4. ……..is a gaseous plant hormone, mainly concerned with maturation and r...

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  5. Ethylene promotes the of fruits.

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  6. Auxins promote in stems and coleptiles.

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  7. promotes growth of root only at low concentrations.

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  8. In most plants, the terminal bud suppresses the development of lateral...

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  9. is found abundantly in liquid endosperm of coconut.

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  10. promotes cell division in the presence of Auxin

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  11. Cytokinin promote the growth of lateral buds even in the presence of a...

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  12. cytokinin delays the process of .

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  13. Gibberellins are the most abundantly found.

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  14. are plant hormones that promote cell division.

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  15. Internodal elongation in rice was caused by fungus.

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  16. gibberellins on plants stimulate extraordinary elongation of .

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  17. Treatment of rosette plants with gibberellin induces sudden.

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  18. .... ..... promotes the production of male flowers in Cucurbits.

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  19. Which breaks dormancy of potato tuber?

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  20. Auxins are efficient than gibberellins in inducing the formation of se...

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