Plant Growth and Development

Pruning of plants promotes branching because the axillary buds get sensitized to

• ethylene

• gibberellin

• cytokinin

• indole acetic acid.

Induction of flowering by low temperature in plants is

• cryobiology

• vernalization

• phototropism

• pruning

Which of the following is an antigibberellin

• Auxin

• Ethylene

• ABA

• Cytokinin

Which of the following is a day neutral plant

• Helianthus annuus

• Euphorbia pulcherrima

• Avena sativa

• Beta vulgaris

Agricultural chemicals include

• growth regulators

• fertilizers

• pesticides

• all of these

Auxin in plant means for

• cell elongation

• fruit ripening

• cell division

• inhibit the root growth

In a plant organ which is covered by periderm and in which the stomata are absent, some gaseous exchange still takes place through

• aerenchyma

• trichornes

• pneumatophores

• lenticels.

Cork cambium results in the formation of cork which becomes impermeable to water due to the accumulation of

• resins

• lignins

• suberin

• tannins.

Bud dormancy is induced by

• ABA

• ethylene

• IAA

• gibberellic acid

2,4- D is an effective

• fungicide

• weedicide

• rodenticide

• wormicide