In plants, the living differentiated cells, have lost the capacity of division under certain conditions. This phenomenon is termed as:
1. | Dedifferentiation | 2. | Proto-differentiation |
3. | Redifferentiation | 4. | Secondary differentiation |
Consider the given two statements:
I: | Removal of shoot tips is widely applied in hedge making and tea plantations. |
II: | Removal of shoot tips usually results in the growth of lateral buds. |
1. Both I and II are correct and II explains I
2. Both I and II are correct but II does not explain I
3. I is correct but II is incorrect
4. I is incorrect but II is correct
I: | Spraying sugarcane crop with gibberellins increases the yield by as much as 20 tonnes per acre. |
II: | Sugarcane stores carbohydrates as sugar in their stems and spraying sugarcane crop with gibberellins increases the length of the stem. |
1. | They were discovered as kinetin, a modified form of adenine. |
2. | Zeatin was isolated from corn-kernels and coconut milk. |
3. | Kinetin occurs widely in almost all plants. |
4. | Natural cytokinins are synthesized in region where rapid cell division occurs. |
1. | ABA | 2. | IAA |
3. | Ethylene | 4. | GA |
I: | The most widely used compound as source of ethylene is ethephon. |
II: | Ethephon in an aqueous solution is readily absorbed and transported within the plant and releases ethylene slowly. |
Consider the given two statements:
I: | Winter varieties of wheat are planted in autumn. |
II: | Spring varieties of wheat are planted in winters. |
1. | Both I and II are correct |
2. | Both I and II are incorrect |
3. | I is correct but II is incorrect |
4. | I is incorrect but II is correct |