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

• auxin

• cytokinin

• gibberelin

• ethylene

The bioassay of auxin is

• avena curvature test

• callus formation

• culture of fungus

• seed dormancy

Induction of flowering by low temperature treatment is

• vernalization

• cryobiology

• photoperiodism

• prunning

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?

• NAA

• ABA

• IAA

• GA

Apical dominance is caused by

• auxin

• gibberellin

• kinetin

• ABA

Which of the following is not caused by deficiency of mineral?

• Chlorosis

• Etiolation

• Shortening of internodes

• Necrosis

Which of the following plant is LDP?

• Xanthium

• Soybean

• Wheat

• Tobacco

In which one pair both the plants can be vegetatively propagated by leaf pieces?

• Bryophyllum and Kalanchoe

• Chrysanthemum and Agave

• Agave and Kalanchoe

• Asparagus and Bryophyllum

Gibberellin was first extracted from

• Gibberella fujikuro

• algae

• bacteria

• roots of higher plants