If a plant needs exposure of light less than a defined period for flowering, such plant is called

1. Long day plants

2. Short day plants

3. Day neutral plants

4. Far red light plants

 95%
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If a plant needs exposure of light more than a well defined critical period for flowering, it would be called as-

(1) Long day plants

(2) Short day plants

(3) Day neutral plants

(4) Red light plants

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When there is no such relation between exposure to light duration and induction of flowering response such plants are called

(1) Long day plants

(2) Short day plants

(3) Day neutral plants

(4) Far red light plants

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From NCERT
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A physiological response of plants to the duration of light and darkness is a:-

(1) daily phase cycle

(2) circadian rhythms

(3) biological clock

(4) photoperiodism

 90%
From NCERT
AIIMS - 2014
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Refer the given figures on photoperiodism and select the correct option.


 86%
From NCERT
AIIMS - 2010
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For the induction of flowering, some plants require a

(1) Periodic exposure to light

(2) Continuous exposure to light

(3) No exposure to light

(4) No exposure to night

 82%
From NCERT
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Which of the following is the site for perception of light/dark in plants?
1. Root apex
2. Shoot apex
3. Leaves
4. Flower

 76%
From NCERT
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With respect to photoperiodism, the short day plant, the long day plant and day neutral plant are represented respectively by:
  
1. A, B and C
2. B, A and C
3. C, B and A
4. A, C and B

 81%
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The photoperiod in plants is perceived at

1. meristem

2. flower

3. floral buds

4. leaves

 88%
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Read following statements and answer in suitable term given in option:-

a. The promotion of flowering by a period of low temperature

b. Hormonal substance migrates from leaves to shoot for inducing flowering 

c. The general metabolic activity of the embryo slow down or in inactive state 

d. Formation of separation layer between tissue

1. Photoperiodism, vernalisation, abscission layer, dormancy

2. Vernalisation, photoperiodism, dormancy, abscission layer

3. Dormancy, photoperiodism, vernalisation, abscission layer

4. Abscission layer, vernalisation, dormancy, photoperiodism 

 

 91%
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