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Question
The only phytohormone which is a gas at ordinary temperature:
Options
Ethane
Ethyl alcohol
Ethylene
Ethyne
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Solution
Ethylene
Explanation:
The only hormone that is gaseous at standard temperature is ethylene.
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RELATED QUESTIONS
Which of the following is not a plant hormone?
Match the items in column A with those of column B.
| Column A | Column B | ||
| (a) | Auxin | (i) | apical dominance |
| (b) | Gibberellin | (ii) | cell-division |
| (c) | Cytokinin | (iii) | fruit ripening |
| (d) | Ethylene | (iv) | internodal elongation |
The tea plants are never allowed to grow lengthwise. This is done by cutting their apical buds, a process known as pruning. In this way, tea plants get a dense growth and easy yield. Answer the following questions:
- Name the scientific phenomenon that is being overcome by pruning.
- What plant hormone is responsible for the scientific phenomenon mentioned in (a)?
- Name one plant hormone which inhibits the said phenomenon.
Answer the following question.
What are plant hormones? Name the plant hormones responsible for the following:
- Growth of stem
- Promotion of cell division
- Inhibition of growth
- Elongation of cells
A farmer is fed up of weeds in his Wheat farm. Which of the following chemicals he can use to overcome the problem?
Match the column A with B
| A | B | |
| i. | Epinasty of flower | GA3 |
| ii. | Natural auxin | NAA |
| iii. | Flowering in Litchi | IAA |
| iv. | Bolting of Beet | Ethylene |
Which of the following is a NOT a naturally occurring phytohormone?
Name the first hormone that was discovered in plant and its precursor.
A plant growth inhibitor hormone which causes wilting of leaves is ______.
Bakane disease of rice is caused by ______.
