Assertion: No secondary growth takes place in monocots.

Reason: Secondary growth is not related with cambium.

• If both assertion and reason are true and reason is the correct explanation of assertion. 

• If both assertion and reason are true but reason is not the correct explanation of assertion. 

• If assertion is true but reason is false. 

• If both assertion and reason are false.

Vernalisation is subjected to plants growing in

• tropical areas

• sub tropical areas

• temperate areas

• hot areas/arctic region.

The phenomenon that operates in the formation of root or shoot in a callus culture is

• differentiation

• re-differentiation

• de-differentiation

• re-juvenation

Which of the following genes do not occur naturally in living organisms

• Bt genes

• RNAi genes

• Cry genes

• Endogeneous cytoplasmic defence genes

DNA and RNA comprise of

• sugar, phosphate, base

• sugar, phosphate

• base, phosphate

• sugar, base

Abscisic acid is known as the stress hormone because it

• breaks seed dormancy

• induces flowering

• promotes leaf fall

• promotes closure of stomata

Dust, oolong and brick are varieties of

• coffee

• pepper

• tea

• lavang

198.

Which of the following plant growth regulators (PGRs) promotes root initiation, flowering and induced parthenocarpy?

• Gibberellin

• Auxin

• Cytokinin

• Ethylene

Refer the given figures on photoperiodism and select the correct option.

• A	B	C
  no correlation between light period and flowering	long light- exposure period	short light- exposure period

• A	B	C
  long light- exposure period	no correlation between light period and flowering	short light- exposure period

• A	B	C
  short light exposure period	long light exposure period	no correlation between light period and flowering

• A	B	C
  no correlation between light period and flowering	short light exposure period	long light exposure period

Assertion: Plant growth as a whole is indefinite.

Reason: Plants retain the capacity of continuous growth throughout their life.

• If both assertion and reason are true and reason is the correct explanation of assertion

• If both assertion and reason are true but reason is not the correct explanation of assertion

• If assertion is true but reason is false

• If both assertion and reason are false.