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Plant Growth and Development

Multiple Choice Questions

61.

In callus culture, roots can be induced by the supply of

auxin
cytokinin
gibberelin
ethylene

62.

The bioassay of auxin is

avena curvature test
callus formation
culture of fungus
seed dormancy

63.

Induction of flowering by low temperature treatment is

vernalization
cryobiology
photoperiodism
prunning

64.

The bioassay of auxin is

avena curvature test
callus formation
culture of fungus
seed dormancy

65.

Which one of the following is a natural growth inhibitor?

66.
Apical dominance is caused by

auxin

gibberellin

kinetin

ABA

auxin

In most of the plants, as the apical bud grows, the growth of lower axillary buds is suppressed. Removal of apical bud results in the growth of lower buds. The auxin (IAA) of the terminal bud inhibits the growth of lateral buds. This phenomenon is known as apical dominance.