Plant - Growth ...

Match Column-I with Column-II and select the correct option from the codes given below

Who isolated auxins from tips of coleoptiles of oat seedlings?

Match column I with column II and select the correct option from the codes given below.

Which of the following hormones is used in root formation on stem cutting?

Apical dominance in dicot plants is due to the presence of more_________ in the apical bud than in the lateral ones.

In addition to auxins, ................ must be supplied to the culture medium to obtain a good callus in plant tissue culture.

Select the mismatched pair.

Read the given statements and select the correct option.
(i) Darwin and Darwin (1880) found that sensation of unilateral illumination was perceived by the coleoptile tip of canary grass.
(ii) IAA is universal natural auxin, discovered by Kogl et al.
(iii) IBA is both natural and synthetic auxin.
(iv) Auxins promote the growth of lateral shoots.

 The term 'auxin precursor' refers to _________________.

Functions of auxins include

The hormone responsible for apical dominance is

The term 'antiauxin' refers to

Which of the following effects of auxins on plants is the basis for their commercial application?

The phenomenon of apical dominace can be overcome by exogenous application of

A plant hormone that induces morphogenesis in plant tissue culture is

Induction of cell division activity and delay in senescence is caused by

Cytokinins are mostly

The hormone which reduces transpiration rate by inducing stomatal closure is

High concentration of auxin is present in

The activity of α - amylase in the endosperm of a germinating seed of barley is induced by

Hormone involved in phototropism is

Which of the following physiological effects is caused in plants by gibberellic acid?

Gibberellin was first extracted from _____________.

Hormone responsible for ageing is

Bud dormancy is induced by

Internodal elongation is stimulated by

Removal of auxin source demonstrates that leaf abscission is _______by auxin, and apical dominance is________by auxin.

The fruits can be left on the three longer using GA so as to extend the market period. This is due to which function of GA?

Natural cytokinins are synthesised in regions where rapid cell division occurs. Such regions are

Cytokinins help to produce all except

Seed dormancy is caused by

Read the given statements and select the option that correctly identifies the incorrect ones.
(i) Cytokinin is primarily concerned with cell division.
(ii) C₂H₄ breaks seed and bud dormancy
(iii) ABA stimulates the opening of stomata.
(iv) C₂H₄ initiates germination in peanut seeds, sprouting of potato tubers.
(v) ABA is synergistic to GA.

The most widely used compound as a source of C₂H₄ is

Which of the following statements regarding gibberellins is incorrect?

Which among the following is not a function of cytokinis?

Gibberellins promote the formation of ______(A)flowers on genetically ______(B) plants in Cannabis whereas ethylene promotes formation of ______(C) flowers on genetically _____(D) Cannabis plants.

A farmer grows cucumber plants in his field. He wants to increase the number of female flowers in them. Which plant growth regulator can be applied to achieve this?

If a rotten fruit gets mixed with unripe fruits, the unripe fruits will

What would happen if you forget to add cytokinin to the culture medium?

Read the given statements and select the correct option.
Statement 1: Ethylene is a gaseous hormone.
Statement 2: Ethylene causes climacteric ripening of fruits.