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Question
Differentiate between:
Stimulus and response
Solution
| Stimulus | Response | ||
| 1. | It comprises. of actions that cause a reaction. All living organisms respond to stimuli. | 1. | It comprises the reaction observed. after an action is performed. |
| 2. | For example, light is a stimulus received by plants. | 2. | For example: On receiving light plants show phototropism that is bent towards the light. |
RELATED QUESTIONS
Stems are
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 question :
What plant hormone is responsible for the scientific phenomenon mentioned in 1.1.
Very Short Answer Question:
Which is the plant stress hormone?
Gibberellins are synthesised from ______.
First natural cytokinin was obtained from ______.
Which hormone induces parthenocarpy in tomatoes?
Which of the following is a NOT a naturally occurring phytohormone?
Cause of degreening is ______.
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 |
The only phytohormone which is a gas at ordinary temperature:
