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
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
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
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
Refer the given figures on photoperiodism and select the correct option.
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
Which of the following is the site for perception of light/dark in plants?
1. Root apex
2. Shoot apex
3. Leaves
4. Flower
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
The photoperiod in plants is perceived at
1. meristem
2. flower
3. floral buds
4. leaves
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