Plant Growth and Development

Match the items in column I with those in column II and choose the correct answer

• 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

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

• auxin

• gibberellin

• cytokinin

• ethylene

Vernalisation promotes flowering by

• low temperature

• high temperature

• prolonged photoperiod

• short photoperiod

Elongation of internode is caused by

• ethylene

• gibberellin

• abscisic acid

• cytokinin

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

The hormone involved in the regulation of florigen synthesis is

• ethylene

• zeatin

• cytokinin

• gibberrellin

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.

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

The correct sequence of cellular growth stages is

• division $\to$ differentiation $\to$ elongation

• differentiation $\to$ division $\to$ elongation

• division $\to$ elongation $\to$ differentiation

• elongation $\to$ differentiation $\to$ division

Auxin was first named by

• C Darwin

• FW Went

• Alexopolus

• KV Thimann