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Plant Growth and Development · Question 24

NEET (UG) 2021MCQEasy📈 Topic in 38% papers+4−1
1

Plants follow different pathways in response to environment or phases of life to form different kinds of structures. This ability is called

  1. Maturity
  2. Elasticity
  3. Flexibility
  4. Plasticity

Answer

(4) Plasticity

Solution

As per NCERT, plants follow different pathways in response to environment or phases of life to form different kinds of structures. This ability is called plasticity.

Example: heterophylly in cotton, coriander and larkspur (juvenile and mature leaves differ), and in buttercup (leaves in air and in water differ).

Answer: (4)

NEET (UG) 2021

Keep practising — Plant Growth and Development

2

The site of perception of light in plants during photoperiodism is

  1. Leaf
  2. Shoot apex
  3. Stem
  4. Axillary bud
NEET (UG) 2021
3

The plant hormone used to destroy weeds in a field

  1. IBA
  2. IAA
  3. NAA
  4. 2, 4-D
NEET (UG) 2021
4

Which of the following is not an inhibitory substance governing seed dormancy?

  1. Para-ascorbic acid
  2. Abscisic acid
  3. Gibberellic acid
  4. Phenolic acid
NEET (UG) 2020
5

Name the plant growth regulator which upon spraying on sugarcane crop, increases the length of stem, thus increasing the yield of sugarcane crop

  1. Abscisic acid
  2. Cytokinin
  3. Gibberellin
  4. Ethylene
NEET (UG) 2020
6

The process of growth is maximum during

  1. Log phase
  2. Lag phase
  3. Dormancy
  4. Senescence
NEET (UG) 2020
7

What is the site of perception of photoperiod necessary for induction of flowering in plants?

  1. Shoot apex
  2. Leaves
  3. Lateral buds
  4. Pulvinus
NEET (UG) 2019
8

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?

  1. Gibberellin and Abscisic acid
  2. Cytokinin and Abscisic acid
  3. Auxin and Ethylene
  4. Gibberellin and Cytokinin
NEET (UG) 2019
9

Fruit and leaf drop at early stages can be prevented by the application of

  1. ethylene
  2. auxins
  3. gibberellic acid
  4. cytokinins.
NEET 2017
10

The Avena curvature is used for bioassay of

  1. IAA
  2. ethylene
  3. ABA
  4. GA3.
NEET 2016 (Phase 1)
11

You are given a tissue with its potential for differentiation in an artificial culture. Which of the following pairs of hormones would you add to the medium to secure shoots as well as roots?

  1. IAA and gibberellin
  2. Auxin and cytokinin
  3. Auxin and abscisic acid
  4. Gibberellin and abscisic acid
NEET 2016 (Phase 2)

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All NEET Botany chapters
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
Class 12Reproduction in OrganismsSexual Reproduction in Flowering PlantsPrinciples of Inheritance and VariationMolecular Basis of InheritanceStrategies for Enhancement in Food ProductionMicrobes in Human WelfareOrganisms and PopulationsEcosystemBiodiversity and ConservationEnvironmental Issues
Other chaptersBiomolecules (Biology)