Important Questions of Plant Growth and Development Biology | Zigya

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121.

Match the items in column I with those in column II and choose the correct answer
Column I Column II
A. Control of weeds 1. Gibberellin
B. Induction of germination 2. Cytokinin
C. Ripening of fruit 3. 2, 4- D
D. Delaying of senescence 4. Ethylene

  • A- 2; B- 4; C- 3; D- 1

  • A- 3; B- 1; C- 4; D- 2

  • A- 1; B- 2; C- 4; D- 3

  • A- 2; B- 3; C- 1; D- 4


122.

The aleurone synthesises and secretes digestive enzymes that hydrolyse nutrients stored in the endosperm, in the presence of

  • auxin

  • gibberellin

  • cytokinin

  • ethylene


123.

Vernalisation promotes flowering by

  • low temperature

  • high temperature

  • prolonged photoperiod

  • short photoperiod


124.

Elongation of internode is caused by

  • ethylene

  • gibberellin

  • abscisic acid

  • cytokinin


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125.

Which one of the following is correct for blooming of 'short day' plants?

  • The long dark period is not critical

  • It is affected by interruption of long dark period by brief exposure of light

  • It is not affected by interruption of long dark period by brief exposure of light

  • It is affected if the continuous light period is interrupted


126.

The hormone involved in the regulation of florigen synthesis is

  • ethylene

  • zeatin

  • cytokinin

  • gibberrellin


127.

Statement I : Sugar beet, cabbage, carrot like plants are monocarpic.

Statement II : Both vernalisation and photoperiodism are related to flowering.

  • Statement I is correct, but Statement II is incorrect

  • Statement II is correct, but Statement I is incorrect.

  • Both statements are correct.

  • Both statements are incorrect.


128.

Fruit ripening is promoted by the hormone that also

  • promotes thinning of fruits in cherry and walnut

  • induce parthenocarpy in tomato

  • promote flowering in lemma

  • induce dormancy


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129.

The correct sequence of cellular growth stages is

  • division  differentiation  elongation

  • differentiation  division  elongation

  • division  elongation  differentiation

  • elongation  differentiation  division


130.

Auxin was first named by

  • C Darwin

  • FW Went

  • Alexopolus

  • KV Thimann


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