Q. No.Coiling of garden pea tendrils around any support is an example of:
1. thigmotaxis
2. thigmonasty
3. thigmotropism
4. thermotaxis
Which one of the following acids is a derivative of carotenoids?
1. Indole-butyric acid
2. Indole-3-acetic acid
3. Gibberellic acid
4. Abscisic acid
1. vessels and tracheid differentiation
2. leaf abscission
3. annual plants
4. floral parts.
The opening of floral buds into flowers is a type of:
1. autonomic movement of locomotion
2. autonomic movement of variation
3. paratonic movement of growth
4. autonomic movement of growth
The wavelength of light absorbed by Pr form of phytochrome is:
1. 640 nm
2. 680 nm
3. 720 nm
4. 620 nm
1. Lemma
2. tobacco
3. cotton
4. Petunia
Which one of the following pairs is not correctly matched?
| 1. | Abscisic acid - Stomatal closure |
| 2. | Gibberellic acid - Leaves fall |
| 3. | Cytokinin - Cell division |
| 4. | IAA - Cell wall elongation |
Parthenocarpic tomato fruits can be produced by:
| 1. | removing androecium of flowers before pollen grains are released |
| 2. | treating the plants with low concentrations of gibberellic acid and auxins |
| 3. | raising the plants from vernalised seeds |
| 4. | treating the plants with phenylmercuric acetate |
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