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प्रश्न
Multiple choice question.
Abscisic acid controls ______.
पर्याय
cell division
leaf fall and dormancy
shoot elongation
cell elongation and wall formation
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उत्तर
Abscisic acid controls leaf fall and dormancy.
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संबंधित प्रश्न
Name the following:
Growth-retarding hormone in plants.
The figure given below shows the stages of ripening in a banana. Answer the question that follow:
Mention two characteristic features of this hormone.
Multiple choice question.
How many molecules of ATP are required to fix one molecule of nitrogen?
Which hormone promotes the production of male flowers in Cucurbits?
Coleoptile tips were removed and placed on agar for one hour, the agar would produce a bending when placed on one side of freshly cut coleoptile stumps.
What is the significance of the above experiment performed by Dr. F. Went?
Match the following lists and select the correct option.
| List I | List II | ||
| i. | 2,4-D | a. | Promotes senescence and ripening of fruits |
| ii. | ABA | b. | DelaysJeaf senescence |
| iii. | Gibberellins | c. | Increases the length of the sugarcane stem |
| iv. | Ethylene | d. | Kills dicotyledonous weeds without affecting mature monocotyledonous plants |
| e. | Stimulates the closure of stomata |
Name the plant hormones responsible for the following
- elongation of cells
- growth of stem
- promotion of cell division
- falling of senescent leaves.
Study the diagram given below and answer the questions that follow:
- Name the phenomenon depicted by the shoot in the above diagram.
- Which plant hormone plays an important role in the above movement?
- Complete and rewrite the given statement by filling in the correct terms:
Shoots show positive ______ whereas, roots show positive ______.
Differentiate between:
Stimulus and response
Bakane disease of rice is caused by ______.
