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CBSE
Class 11 Biology
Plant Growth And Development
Quiz 1
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Mechanism of development was explained by
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Hans Dietrisch
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Spemann
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Both a and b
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Haemmerling
Explanation
Both a and b
Intercalary meristems are of
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Permanent nature
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Temporary nature
0%
Some are permanent some temporary
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None of these
Explanation
Temporary nature
Cells of fibers and tracheids elongate during
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Phase of cell division
0%
Phase of cell elongation
0%
Phase of cell maturation
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Phase of cell differentiation
Explanation
Phase of cell division
Typical plant growth shows _________ curve.
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J-shaped
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S-shaped
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I-shaped
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Parabolic
Explanation
S-shaped
Exponential growth of the plants is express as W
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ability of the plant to produce new cells
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efficiency index
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relative growth rate
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all of the above
Explanation
all of the above
Opening of floral buds into flowers, is a type of:
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Autonomic movement of variation
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Autonomic movement of locomotion
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Autonomic movement of growth
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Paratonic movement of growth
Explanation
Autonomic movement of growth
Which one is incorrect?
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Epiblast is presumptive ectoderm and mesoderm
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Hypoblast is presumptive endoderm
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Hypoblast is presumptive mesoderm
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Upper layer of cells in blastoderm is epiblast
Explanation
Hypoblast is presumptive mesoderm
The stage of rapid cell division just after fertilization is
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Organogenesis
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Cleavage
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Gastrulation
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Growth
Explanation
Cleavage
Plants grow throughout their life due to
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presence of meristems
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presence of vascular cambium
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presence of xylem and phloem
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presence of tracheids
Explanation
presence of meristems
Liver and pancreas arise from
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Foregut
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Midgut
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Hindgut
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None of these
Explanation
Foregut
Which one of the followings is a gaseous plant hormone?
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Ethylene
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Gibberellin
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IAA
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Abscisic acid
Explanation
Ethylene
To prevent over – ripening, bananas should be
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given a dip in ascorbic acid
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maintained at room temperature
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refrigerated
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stored at the top of refrigerator
Explanation
refrigerated
Growth in dorsiventral leaf is measured in terms of
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length of leaf
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increase in cell number
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surface area increase
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none of these
Explanation
surface area increase
The ability to regain or recover the lost or injured part of body is
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Aging
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Regeneration
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Abnormal development
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Primary inductio
Explanation
Regeneration
Which growth hormone accerlates the malting process in brewing industry?
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Auxins
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Gibberellins
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Ethylene
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Cytokinins
Explanation
Gibberellins
Which plant growth regulator is the derivative of carotenoids?
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Auxin
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Gibberelic acid
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Cytokinin
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Abscisic acid
Explanation
Abscisic acid
Mobilisation of stored food in germinating seeds is triggered by
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auxins
0%
cytokinins
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gibberellins
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ethylene
Explanation
gibberellins
Cavity formed between somatic and splanchnic mesoderm is called
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Gastrocoele
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Blastocoele
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Coelom
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Neurocoele
Explanation
Coelom
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