Treatment of seed at low temperature under moist conditions to break its dormancy is called 
1. scarification
2. vernalization
3. chelation
4. stratification

Subtopic:  Seed Dormancy (OLD NCERT) |
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An enzyme that can stimulate germination of barley seeds is:-
1. α-amylase                 
2. lipase
3. protease                   
4. invertase

Subtopic:  Gibberellin |
 80%
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One set of a plant was grown at 12 hours a day and 12 hours night period cycles and it flowered while in the other set, night phase was interrupted by a flash of light and it did not produce a flower. Under which one of the following categories will you place this plant?
1. Darkness neutral
2. Day neutral
3. Short day
4. Long day

Subtopic:  Photoperiodism (OLD NCERT) |
 63%
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NCERT textbook says that plant growth is unique. What is the character of plant growth being referred to?
1. Plants have a closed growth
2. Capacity of unlimited growth throughout life
3. Complete absence of growth after a certain age
4. Growth without development

Subtopic:  Growth | Growth Model |
 89%
From NCERT
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All the following contribute to an increase in girth of dicots and gymnosperms except:

1. Apical meristem 2. Lateral meristems
3. Vascular cambium 4. Cork-cambium
Subtopic:  Growth | Growth Model | Growth Terminology |
 80%
From NCERT
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Match Column I [phase of growth] and Column II [cell characteristics] and choose the correct answer from the codes given:

Column I Column II
A. Meristematic a. Increased vacuolation, new cell wall deposition
B. Elongation b. Thin cellulosic wall with abundant plasmodesmatal connections
C. Maturation c. Maximal wall thickening

Codes

A B C
1. a b c
2. b c a
3. b a c
4. c b a
Subtopic:  Growth | Development |
 73%
From NCERT
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Identify the incorrect statement regarding the arithmetic growth?

1. Following mitosis, both daughter cells continue to divide
2. Can be exemplified by root elongating at a constant rate
3. On plotting the length of the organ against time, a linear curve is obtained
4. Mathematically it is expressed as Lt=L0+rt
Subtopic:  Growth | Growth Terminology |
 78%
From NCERT
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The shape of the growth curve characteristic of a living organism growing in natural environment is:

 
1. Linear 2. Sigmoid
3. Hyperbola 4. Bell shaped
Subtopic:  Growth Terminology |
 90%
From NCERT
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Plant growth and further development is intimately linked to water status of the plant because:
A. Turgidity of cells helps in extension growth
B. It provides medium for enzymatic activity
1. Both A and B are correct                             
2. Only A is correct
3. Only B is correct                                         
4. Both A and B are incorrect

Subtopic:  Growth | Growth Terminology |
 88%
From NCERT
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The optimum temperature range for proper growth in most plants is:

 
1. \(0^\circ C - 100^\circ C\) 2. \(15^\circ C - 20^\circ C\)
3. \(28^\circ C - 30^\circ C\) 4. Greater than \(45^\circ C\)
Subtopic:  Growth Terminology | Development |
 66%
From NCERT
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