141.
Removal of shoot tips is a very useful technique to boost the production of tealeaves. This is because :
A
Gibberellins delay senescence of leaves
B
Gibberellins prevent bolting and are inactivated
C
Auxins prevent leaf drop at early stages
D
Effect of auxins is removed and growth of lateral buds is enhanced
Answer :
Effect of auxins is removed and growth of lateral buds is enhanced
Discuss Question
No explanation is given for this question. Let's discuss the answer together.
142.
The movement of auxin is largely
A
Acropetal
B
Basipetal
C
Lateral
D
Centripetal
Answer :
Basipetal
Discuss Question
No explanation is given for this question. Let's discuss the answer together.
143.
Apical dominance can be overcome by application of
A
Auxin
B
Gibberellin
C
Cytokinin
D
Florigen
Answer :
Cytokinin
Discuss Question
No explanation is given for this question. Let's discuss the answer together.
144.
Which one of the following growth regulators is known as 'stress hormone'?
A
Abscissic acid
B
Ethylene
C
GA3
D
Indole acetic acid
Answer :
Abscissic acid
Discuss Question
No explanation is given for this question. Let's discuss the answer together.
145.
Anthesis is a phenomenon which refers to
A
reception of pollen by stigma
B
formation of pollen
C
development of anther
D
opening of flower bud
Answer :
opening of flower bud
Discuss Question
No explanation is given for this question. Let's discuss the answer together.
146.
Klinostat is employed in the study of
A
osmosis
B
growth movements
C
photosynthesis
D
respiration
Answer :
growth movements
Discuss Question
No explanation is given for this question. Let's discuss the answer together.
147.
Which of the following hormones can replace vernalization
A
Cytokinins
B
Auxins
C
Ethylene
D
Gibberellin
Answer :
Gibberellin
Discuss Question
No explanation is given for this question. Let's discuss the answer together.
148.
Which is not a plant hormone
A
Phytochrome
B
Florigen
C
GA
D
IAA
Answer :
Phytochrome
Discuss Question
No explanation is given for this question. Let's discuss the answer together.
149.
Photoperiodism was first characterised in:
A
tobacco
B
potato
C
tomato
D
cotton
Answer :
tobacco
Discuss Question
No explanation is given for this question. Let's discuss the answer together.
150.
Typical growth curve in plants is :
A
Linear
B
Stair-steps shaped
C
Parabolic
D
Sigmoid
Answer :
Sigmoid
Discuss Question
No explanation is given for this question. Let's discuss the answer together.