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Seed dormancy
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Solving time: 1 mins

Seed dormancy

A
is the temporal delay to the process of germination.

B
is the permanent delay to the process of germination.

C
minimizes seedling survival by preventing germination.

D
occurs due to the presence of growth inhibitors only.

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Xtract Objective Biology for NEET (Disha)

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Seed dormancy is defined as a state in which seeds are prevented from germinating even under environmental conditions, normally favourable for germination. These conditions are a complex combination of water, light, temperature, gasses, mechanical restrictions, seed coats, and hormone structures.
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Practice questions from Xtract Objective Biology for NEET (Disha)

Question 1
Easy
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Which one of the following pairs, is not correctly matched?
  1. IAA - Cell wall elongation
  2. Abscisic acid - Bolting
  3. Gibberellic acid - Stem elongation
  4. Cytokinin - Cell division
Topic

Topic:

Plant Growth and Development

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Xtract Objective Biology for NEET (Disha)

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Question 2
Easy
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Views: 5,419

Which one is the first Gibberellins to be discovered and remains the most intensively studied form?
Topic

Topic:

Plant Growth and Development

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Book:

Xtract Objective Biology for NEET (Disha)

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Question 3
Easy
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Views: 5,891

Match the growth regulators in column-I with the processes in column-II and choose the correct combination.

A. Auxin I. Colouring test in lemon
B. Gibberellin II. Cell division test in plants
C. Cytokinin III. curvature test
D. Ethylene IV. Dwarf corn test
  1. A – (III), B – (IV), C – (II), D – (I)
  2. A – (I), B – (IV), C – (II), D – (III)
  3. A – (IV), B – (III), C – (I), D – (II)
  4. A – (II), B – (I), C – (IV), D – (III)
Topic

Topic:

Plant Growth and Development

Book

Book:

Xtract Objective Biology for NEET (Disha)

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Question 4
Medium
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Which of the following statements on phytohormones & their action are correct?
(i) Cytokinins specially help in delaying senescence.
(ii) Auxins are involved in regulating apical dominance.
(iii) Ethylene is specially useful in enhancing seed germination.
(iv) Gibberellins are responsible for immature falling of leaves.
  1. (i) and (iii) only
  2. (i) and (iv) only
  3. (i) and (ii) only
  4. (ii) and (iii) only
Topic

Topic:

Plant Growth and Development

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Book:

Xtract Objective Biology for NEET (Disha)

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Practice more questions from Plant Growth and Development

Question 1
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Views: 5,662

The plant growth regulators :
  1. Inhibit the growth of plants
  2. Include environmental factors of biotic and abiotic origin
  3. Promote or inhibit the growth of plants
  4. Includes various chemicals which induce dormancy in plants
Topic

Topic:

Plant Growth and Development

View 2 solutions

Question 2
Medium
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Views: 5,736

The given figure shows the comparison of growth rate of two leaves (A and B) over the period of one day. Both the leaves A and B have increased their area in a given time to produce A’ and B’ leaves respectively. If AGR = absolute growth rate and RGR = relative growth rate, then select the correct option.
  1. A- leaf:
    AGR- 1%
    RGR- 1
    B- leaf
    AGR- 2%
    RGR- 2
  2. A- leaf:
    AGR- 100%
    RGR- 5
    B- leaf
    AGR- 10%
    RGR- 5
  3. A- leaf:
    AGR- 5
    RGR- 100%
    B- leaf
    AGR- 5
    RGR- 10%
  4. A- leaf:
    AGR- 0.5
    RGR- 100%
    B- leaf
    AGR- 1.5
    RGR- 100%
Topic

Topic:

Plant Growth and Development

Book

Book:

Xtract Objective Biology for NEET (Disha)

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Question 3
Easy
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Views: 5,322

A phytohormone is
  1. an ion that alters turgor pressure.
  2. small molecules of diverse chemical composition.
  3. a pigment responds to environmental changes.
  4. a secondary metabolic compound.
Topic

Topic:

Plant Growth and Development

Book

Book:

Xtract Objective Biology for NEET (Disha)

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Question 4
Easy
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Views: 5,956

Specific areas in higher plants which take part in the formation of new cells are called
  1. Permanent tissue
  2. Quicent centre
  3. Meristems
  4. Subapical part
Topic

Topic:

Plant Growth and Development

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Question Text
Seed dormancy
TopicPlant Growth and Development
SubjectBiology
ClassClass 11
Answer TypeText solution:1
Upvotes142