Q. No.Which of the following does not has two kinds of varieties?
(1) Wheat
(2) Radish
(3) Barley
(4) Rye
(1) Wheat
(2) Radish
(3) Barley
(4) Rye
The spring varieties are normally planted in…...and come to flower and produce grain……
(1) Autumn season, after the end of growing season
(2) Spring season, at the end of growing season
(3) Spring season, before the end of growing season
(4) Autumn season, at the end of growing season
The phytohormone, which was first isolated from human urine, shows
| a. | Bolting effect. |
| b. | Apical dominance. |
| c. | Control of xylem differentiation. |
| d. | Promote leaf senescence. |
| e. | Ripening of fruit. |
| f. | Initiation of rooting is stem cuttings. |
| 1. | b, c and f |
| 2. | a, d and e |
| 3. | b, e and f |
| 4. | a, b and d |
Vernalisation prevents
(1) Precocious reproductive development late in growing season
(2) Late reproductive development
(3) Flowering
(4) Fruiting
Flowering can be affected in certain plants
(1) by quantitative exposure to low temperature
(2) by qualitative exposure to low temperature
(3) Both A and B
(4) It does not depend on low temperature exposure
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
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
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