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Plant Growth and Development · Question 79

AIPMT 2000MCQEasy📈 Topic in 50% papers+4−1
1

If the apical bud has been removed then we observe

  1. more lateral branches
  2. more axillary buds
  3. plant growing stops
  4. flowering stops

Answer

(1) more lateral branches

Solution

As per NCERT, the growing apical bud inhibits the growth of the lateral (axillary) buds; this is called apical dominance and is caused by auxin.

∴ When the shoot tip is removed (decapitation), the axillary buds already present grow out, giving more lateral branches (used in tea plantations and hedge-making).

Answer: (1)

AIPMT 2000

Keep practising — Plant Growth and Development

2

By which action a seed coat becomes permeable to water?

  1. scarification
  2. stratification
  3. vernalization
  4. all of the above
AIPMT 2000
3

Which hormone is responsible for fruit ripening?

  1. Ethylene
  2. Auxin
  3. Ethyl chloride
  4. Cytokinin
AIPMT 2000
4

Coconut milk is used in tissue culture because it contains

  1. Auxin
  2. Gibberellin
  3. Ethylene
  4. Cytokinin
Out of syllabusAIPMT 2000

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Class 11The Living WorldBiological ClassificationPlant KingdomMorphology of Flowering PlantsAnatomy of Flowering PlantsCell: The Unit of LifeCell Cycle and Cell DivisionTransport in PlantsMineral NutritionPhotosynthesis in Higher PlantsRespiration in PlantsPlant Growth and Development
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