Plant Growth and Development ( Seed germination; Phases of Plant Growth and Plant Growth Rate; Conditions of Growth; Differentiation, Dedifferentiation and Redifferentiation; Sequence of Developmental Process in a Plant Cell; Growth Regulators Auxin, Gibberellin...) NEET Questions

Biology - Plant Physiology

Plant Growth and Development ( Seed germination; Phases of Plant Growth and Plant Growth Rate; Conditions of Growth; Differentiation, Dedifferentiation and Redifferentiation; Sequence of Developmental Process in a Plant Cell; Growth Regulators Auxin, Gibberellin...) MCQ Questions


13.
Which of the following is used to delay senescence in leafy vegetables?
A.
Cytokinin
B.
Ethylene
C.
ABA
D.
Auxin
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ANSWER :
A. Cytokinin
14.
The term for an increase in the number of cells is:
A.
Arithmetic growth
B.
Geometric growth
C.
Differentiation
D.
Dedifferentiation
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ANSWER :
A. Arithmetic growth
15.
Phototropism is caused mainly by which hormone?
A.
Cytokinin
B.
Auxin
C.
Gibberellin
D.
ABA
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ANSWER :
B. Auxin
16.
The term "bolting" refers to:
A.
Internodal elongation in rosette plants
B.
Formation of callus
C.
Breaking seed dormancy
D.
Delaying senescence
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ANSWER :
A. Internodal elongation in rosette plants
17.
Which plant hormone is associated with stress responses like drought tolerance?
A.
ABA
B.
Auxin
C.
Cytokinin
D.
Gibberellin
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ANSWER :
A. ABA
18.
Which of the following conditions is essential for seed germination?
A.
Darkness
B.
High COâ‚‚
C.
Water
D.
Ethylene
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ANSWER :
C. Water