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

Auxin in plant means for

• cell elongation

• fruit ripening

• cell division

• inhibit the root growth

Pencils are prepared from the wood of

• Pinus vinaster

• Juniperus virginiana

• Chamaecyparis piscifera

• Abies pindrow

Ageing is retarded by

• ABA

• CKN

• GA

• C₂H₄

Agricultural chemicals include

• growth regulators

• fertilizers

• pesticides

• all of these

180.

The dormancy of seed is regulated by

• ABA

• Ethylene

• GA- 3

• Dihydrozeatin