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


1.
What is the nature of plant growth?
A.
Finite
B.
Indeterminate
C.
Limited
D.
Fixed
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ANSWER :
B. Indeterminate
2.
Which phase of growth curve involves cell division, elongation, and maturation?
A.
Lag phase
B.
Log phase
C.
Stationary phase
D.
All phases together
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ANSWER :
D. All phases together
3.

Which plant hormone is primarily responsible for cell elongation in stems?

NEET - 2020

A.

Cytokinin

B.

Auxin

C.

Gibberellin

D.

Ethylene

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ANSWER :

B. Auxin

4.
In arithmetic growth, the rate of growth is:
A.
Exponential
B.
Geometric
C.
Constant
D.
Linear
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ANSWER :
D. Linear
5.
Which hormone promotes senescence and abscission in plants?
A.
Cytokinin
B.
Ethylene
C.
Auxin
D.
Gibberellin
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ANSWER :
B. Ethylene
6.
Seed dormancy can be broken by:
A.
Gibberellin
B.
ABA
C.
Ethylene
D.
Cytokinin
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ANSWER :
A. Gibberellin