Auxin can be bioassayed by

• Avena coleoptile curvature

• Hydroponics

• Potometer

• Potometer

Through their effect on plant growth regulators, what do the temperature and light control in the plants?

• Apical dominance

• Flowering

• Closure of stomata

• Closure of stomata

Which one of the following generally acts as an antagonist to gibberellins?

• Zeatin

• Ethylene

• ABA

• ABA

Vernalisation stimulates flowering in

• Zamikand

• Turmeric

• Carrot

• Carrot

What causes a green plant exposed to the light on only one side, to bend toward the source of light as it grows?

• Green plants need light to perform photosynthesis.

• Green plants seek light because they are phototropic

• Light stimulates plant cells on the lighted side to grow faster

• Light stimulates plant cells on the lighted side to grow faster

Typical growth curve in plants is

• sigmoid

• linear

• Stair-steps shaped

• Stair-steps shaped

Typical growth curve in plants is 

• sigmoid

• linear

• stair-steps shaped

• stair-steps shaped

A drupe develop in 

• Wheat

• pea

• tomato

• tomato

Phototropic curvature is the result of uneven distribution of 

• gibberellin

• phytochrome

• cytokinins

• cytokinins

120.

The technical term used for the androecium in a flower of China rose (Hibiscus rosa siensis( is 

• monadelphous

• diadelphous

• polyandrous

• polyandrous