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प्रश्न
Stems are
विकल्प
positively geotropic and negatively phototropic
positively geotropic and positively phototropic
negatively geotropic and positively phototropic
negatively phototropic and negatively geotropic
उत्तर
negatively geotropic and positively phototropic
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संबंधित प्रश्न
How does chemical coordination occur in plants?
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.
Very Short Answer Question:
Which is the plant stress hormone?
Which hormone induces parthenocarpy in tomatoes?
Apical dominance refers to ____________.
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 various plant hormones. Also give their physiological effects on plant growth and development.
The only phytohormone which is a gas at ordinary temperature:
The response by parts of the plant towards stimulus is called as ______.
Define the following term:
Phytohormones
