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


7.
Which of the following is NOT a growth regulator?
A.
Auxin
B.
Chlorophyll
C.
Gibberellin
D.
ABA
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ANSWER :
B. Chlorophyll
8.
The lag phase of the growth curve is characterized by:
A.
Little or no growth
B.
Maximum growth rate
C.
Constant growth
D.
Declining growth
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ANSWER :
A. Little or no growth
9.

Which of the following is a synthetic auxin?

NEET - 2018

A.

Indole-3-acetic acid (IAA)

B.

Naphthaleneacetic acid (NAA)

C.

Gibberellic acid (GA₃)

D.

Zeatin

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ANSWER :

B. Naphthaleneacetic acid (NAA)

10.
Which phase of growth curve shows maximum growth rate?
A.
Lag phase
B.
Log phase
C.
Stationary phase
D.
Decline phase
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ANSWER :
B. Log phase
11.
Redifferentiation occurs when:
A.
Meristematic cells form permanent tissues
B.
Permanent cells regain the ability to divide
C.
Permanent cells perform new functions
D.
Meristematic cells elongate
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ANSWER :
C. Permanent cells perform new functions
12.
Which plant growth regulator is gaseous in nature?
A.
Cytokinin
B.
Gibberellin
C.
Ethylene
D.
Abscisic acid
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ANSWER :
C. Ethylene