- 1(current)
Q. No.What is incorrect regarding the results of experiments conducted on coleoptiles of canary grass and oats by Charles Darwin and Francis Darwin on phototropism?
| 1. | Both plants grow toward the light source. |
| 2. | The tips of coleoptiles were covered with a metal foil and the coleoptiles did not grow toward light. |
| 3. | When the metal foil was removed they still not grew toward the light. |
| 4. | The growing region of the coleoptiles rather than their tips was covered and the coleoptiles grew toward the light. |
Subtopic: Â Growth Hormones & Auxin |
 53%
Level 3: 35%-60%
Plant growth regulators do not:
| 1. | act by altering gene expression. |
| 2. | have multiple effects. |
| 3. | function independently of other hormones. |
| 4. | control cell division and cell differentiation |
Subtopic: Â Growth Hormones & Auxin |
Level 3: 35%-60%
The newly discovered PGR brassinosteroids have effects qualitatively similar to:
1. Auxins
2. Gibberellins
3. Cytokinins
4. Ethylene
Subtopic: Â Growth Hormones & Auxin |Â Auxin Function |
Level 3: 35%-60%
The plant hormones that are produced by wounded plants and play a key role in controlling plant defences against herbivores as well as responsible for enchanting fragrance of jasmine are:
1. Brassinosteroids
2. Strigolactones
3. Jasmonates
4. Auxins
Subtopic: Â Growth Hormones & Auxin |
Level 3: 35%-60%
- 1(current)
Q. No.
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