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 |
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True seed dormancy:
1. is caused by conditions within the seed that prevent germination under normally ideal conditions.
2. is caused by unfavourable environmental conditions.
3. is seen in all seeds.
4. does not have any evolutionary significance.
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1. Abscisic acid | 2. Phenolic acids |
3. Para-ascorbic acid | 4. Gibberellic acid |
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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. |
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1. | ABA | 2. | IAA |
3. | Ethylene | 4. | GA |
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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. |
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