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.
Growth in plants is best defined as:
A.
Cell movement
B.
A reversible increase in volume
C.
An irreversible permanent increase in size of an organ or its parts or of an individual cell
D.
Production of seeds
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ANSWER :
C. An irreversible permanent increase in size of an organ or its parts or of an individual cell
8.
The three phases of growth in plants are:
A.
Germination, growth, dormancy
B.
Initiation, elongation, termination
C.
Cell division, photosynthesis, respiration
D.
Meristematic, elongation, and maturation
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ANSWER :
D. Meristematic, elongation, and maturation
9.
In which phase of growth do cells show vacuolation, cell wall thickening, and storage of new protoplasm?
A.
Phase of meristematic activity
B.
Phase of maturation
C.
Phase of elongation
D.
Phase of senescence
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ANSWER :
C. Phase of elongation
10.
The phase of growth where cells attain their maximum size and undergo differentiation is called:
A.
Phase of meristematic activity
B.
Phase of senescence
C.
Phase of elongation
D.
Phase of maturation
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ANSWER :
D. Phase of maturation
11.
Cells of meristematic phase have:
A.
No nuclei
B.
Lignified cell walls
C.
Dense protoplasm, large nuclei, and thin cellulose cell walls
D.
Large vacuoles and thick walls
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ANSWER :
C. Dense protoplasm, large nuclei, and thin cellulose cell walls
12.
The mathematical expression of arithmetic growth is:
A.
Lt = L0 + rt
B.
L1 = L0 × e^(rt)
C.
Lt = L0 × 2^t
D.
Lt = L0 / r
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ANSWER :
A. Lt = L0 + rt