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Plant Growth and Development NEET PYQs
Class XI Biology
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NCERT Based
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NEET Practice
📘 Concept Based
📝 Exam Level
🤖 AI Explanations
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22 questions in this chapter
A species which was introduced for ornamentation but has become a trouble-some weed in India:
A Parthenium hysterophorus B Eichhornia crassipes C Prosopis juliflora D Trapa spinosa
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Which of the following is not an inhibitory
substance governing seed dormancy?
A Gibberellic acid B Abscisic acid C Phenolic acid D Para-ascorbic acid
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The process of growth is maximum during:
A Log phase B Lag phase C Senescence D Dormancy
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Name the plant growth regulator which upon
spraying on sugarcane crop, increases the length
of stem, thus increasing the yield of sugarcane
crop.
A Cytokinin B Gibberellin C Ethylene D Abscisic acid
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It takes very long time for pineapple plants to
produce flowers. Which combination of hormones
can be applied to artificially induce flowering in
pineapple plants throughout the year to increase
yield?
A Gibberellin and Cytokinin B Gibberellin and Abscisic acid C Cytokinin and Abscisic acid D Auxin and Ethylene
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What is the site of perception of photoperiod
necessary for induction of flowering in plants:
A Lateral buds B Pulvinus C Leaves D Shoot apex
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Formation of interfascicular cambium from fully developed parenchyma cells is an example for:
A Redifferentiation B Differentiation C Maturation D Dedifferentiation
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Explanation: NCERT Page no. 245
Auxin is used by gardeners to prepare weed-free lawns. But no damage is caused to grass as auxin:
A promotes abscission of mature leaves only. B promotes apical dominance. C can help in cell division in grasses, to produce growth.
D does not affect mature monocotyledonous plants.
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Explanation: NCERT Page No.176, (Topic-13.4.3.1 Auxins)
Spraying sugarcane crop with which of the following plant growth regulators, increases the length of stem, thus, increasing the yield?
A Gibberellin B Auxin C Abscisic acid D Cytokinin
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Explanation: NCERT Page No.176, (Topic-13.4.3.2 13.4.3.2 Gibberellins)
Which of the following plant growth regulators is used as herbicide?
A 2,4-D B Kinetin C Abscisic acid D Gibberellin
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2,4-D is a synthetic auxin widely used as a selective herbicide for controlling broad-leaved weeds.
