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Plant Growth And Development

339 Questions Start Allen Test
All Exams Allen Errorless
Q251 Allen NCERT BASED QUESTIONS MCQ
(i) Promote nutrient mobilisation (ii) Overcome the apical dominance (iii) Lateral shoot growth All the above physiological effects are related to which of the following plant growth regulators?
A.
Auxins
B.
Gibberellins
C.
Abscisic acid
D.
Cytokinins
Q252 Allen NCERT BASED QUESTIONS MCQ
Which of the following statements are correct regarding growth?
(A) In plants, the form of growth is open and localised
(B) Swelling of piece of wood in water is considered as growth since it involve the increase in size
(C) Growth is accompanied by metabolic processes
(D) Growth, at a cellular level, is a result of increase in the amount of protoplasm
A.
A, B, C and D
B.
A and B
C.
B, C and D
D.
A, C and D
Q253 Allen NCERT BASED QUESTIONS MCQ
Meristematic phase of growth is characterised by :-
A.
Increased vacuolation
B.
Maximal size in terms of protoplasmic modifications
C.
Cells those are rich in protoplasm and having thin cell walls with abundant plasmodesmata
D.
Cell enlargement
Q254 Allen NCERT BASED QUESTIONS MCQ
Which of the following is/are related to the type of growth in which both the progeny cells, arise from mother cell, retain the ability to divide?
(A) Sigmoid curve
(B) expressed as W₁ = W₀ + rt
(C) Linear curve
(D) Three phases - Lag, exponential and stationary
A.
A and D
B.
A, B and D
C.
Only C
D.
B and C
Q255 Allen NCERT BASED QUESTIONS MCQ
Match the following :
Column-IColumn-II
(a)Auxin
(b)Gibberellin
(c)Cytokinin
(d)Ethylene
(e)Abscisic acid
(i)Derivatives of carotenoids
(ii)Gas
(iii)Adenine derivatives
(iv)Terpenes
(v)Indole compounds
A.
a-i,b-ii,c-iii,d-iv,e-v
B.
a-ii,b-i,c-v, d-iii,e-iv
C.
a-v, b-iv,c-iii,d-ii,e-i
D.
a-iv,b-iii,c-i,d-ii,e-v
Q256 Allen NCERT BASED QUESTIONS MCQ
Math the following :
Column-IColumn-II
(a)Human urine
(b)Coconut milk
(c)Ripened oranges
(d)Gibberella fujikuroi
(i)Ethylene
(ii)GA₃
(iii)Auxin
(iv)Cytokinin
A.
a - iii, b - iv, c - i, d - ii
B.
a - i, b - ii, c - iii, d - iv
C.
a - iv, b - iii, c - ii, d - i
D.
a - ii, b - i, c - iv, d - iii
Q257 Allen NCERT BASED QUESTIONS MCQ
Match the following :
Column-IColumn-II
(a)Cytokinin
(b)Auxin
(c)Abscisic acid
(d)Ethylene
(e)Gibberellin hormone
(i)Weed free lawns
(ii)Brewing industry
(iii)Root hair formation
(iv)Overcome apical dominance
(v)Stress
A.
a-iv,b-i, c-v, d-ii, e-iii
B.
a-i, b-ii,c-v, d-iii,e-iv
C.
a-iii,b-iv,c-v,d-i, e-ii
D.
a-iv, b-i, c-v, d-iii,e-ii
Q258 Allen NCERT BASED QUESTIONS MCQ
Which of the following occur naturally in plants?
A.
2, 4-dichlorophenoxyacetic acid
B.
Indole butyric acid
C.
Naphthalene acetic acid
D.
Kinetin
Q259 Allen NCERT BASED QUESTIONS MCQ
Consider the following statements. (I) The basis to the phenomenon of growth is formation of new protoplasm. (Il) Growth is maximum is zone of cell elongation. Choose the correct option.
A.
Statement I is true, but Il is false.
B.
Statement I is false, but Il is true.
C.
Statement I and Il are true.
D.
Statement I and II are false.
Q260 Allen NCERT BASED QUESTIONS MCQ
Swelling of piece of wood when placed in water is not considered as growth because:
A.
It does not occur at expense of energy
B.
It is not a metabolic change
C.
It is reversible process
D.
All of the above
Q261 Allen NCERT BASED QUESTIONS MCQ
Plant growth is unique because :
A.
It is intrinsic
B.
It occurs at the expense of energy
C.
Plant retains the capacity for unlimited growth throughout their life
D.
Its accompanied by metabolic processes
Q262 Allen NCERT BASED QUESTIONS MCQ
Growth at a cellular level, is principally a consequence of increase in amount of :
A.
Cell wall material
B.
Water
C.
Protoplasm
D.
Cell sap
Q263 Allen NCERT BASED QUESTIONS MCQ
Cells with increased vacuolation, cell enlargement and new cell wall deposition are the characteristic features of which phase of growth?
A.
Meristematic phase
B.
Elongation phase
C.
Maturation phase
D.
Differentiation phase BPD128
Q264 Allen NCERT BASED QUESTIONS MCQ
Trees showing seasonal activities, represent what kind of growth curve ?
A.
Sigmoid
B.
Linear
C.
J-shaped
D.
Hyperbola
Q265 Allen NCERT BASED QUESTIONS MCQ
Quantitative comparisons between the growth of living systems can be made by :
A.
Absolute growth rate
B.
Relative growth rate
C.
Exponential growth rate
D.
Both (1) and (2)
Q266 Allen NCERT BASED QUESTIONS MCQ
Nutrients both macro and micro essential elements are required by plant during growth for:
A.
Synthesis of protoplasm
B.
As source of energy
C.
Enzyme of activation
D.
All of the above
Q267 Allen NCERT BASED QUESTIONS MCQ
Parenchyma cells that are made to divide under controlled laboratory conditions during plant tissue culture, represents :
A.
Differentiation
B.
Dedifferentiation
C.
Redifferentiation
D.
Undifferentiated mass of cells
Q268 Allen NCERT BASED QUESTIONS MCQ
Select out the incorrect match :
A.
GA - speed up malting process
B.
Auxin - Xylem differentiation
C.
Cytokinin - Adventitious shoot formation
D.
Ethylene - Lateral shoot growth
Q269 Allen NCERT BASED QUESTIONS MCQ
Removal of shoot tip (decapitation) is useful in:
A.
Promotion of Apical dominance
B.
Bolting
C.
Tea plantation
D.
Senescence
Q270 Allen NCERT BASED QUESTIONS MCQ
Which of the following phenomenon in plants requires interaction of more than one plant growth regulator :-
A.
Dormancy in seeds/buds
B.
Apical dominance
C.
Senescence
D.
All of the above
Q271 Allen NCERT BASED QUESTIONS MCQ
Which of diagram is correct about the curvature of coleoptile ?
A.
B.
C.
D.
Q272 Allen NCERT BASED QUESTIONS MCQ
Which of the following is/are correct about 'kinetin'?
A.
Kinetin occurs naturally in plants
B.
It is a modified form of a purine
C.
Isolated from herring egg DNA
D.
All of the above
Q273 Allen NCERT BASED QUESTIONS MCQ
Which of the following plant growth regulators (PGRs) belongs to that group of PGRs which play an important role in plant response to wounds?
A.
Auxin
B.
Gibberellin
C.
Cytokinin
D.
Abscisic acid
Q274 Allen NCERT BASED QUESTIONS MCQ
Which of the following plant growth regulators is synthesised in large amounts by tissues undergoing senescence and ripening fruits ?
A.
Gibberellin
B.
Zeatin
C.
IBA
D.
Ethylene
Q275 Allen ANALYTICAL QUESTIONS MCQ
Select out the incorrect match :-
A.
Water → Cell enlargement
B.
Oxygen → Enzyme activation
C.
Minerals → Osmotic regulation
D.
Light → Flowering