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प्रश्न
Movement of molecules of a substance from the region of their higher concentration to the region of their lower concentration without the involvement a separating membrane, is called
विकल्प
Osmosis
Diffusion
Active transport
Capillarity
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उत्तर
Diffusion
संबंधित प्रश्न
Leaves of the sensitive plant wilt and droop down on a slight touch. What mechanism brings about this change?
The diagram given below represents an experimental set-up to demonstrate a certain process. Study the same and answer the questions that follow:
- Name the process.
- Define the above-named process.
- What would you observe in the experimental set-up after an hour or so?
- What control experiment can be set up for comparison?
- Keeping in mind the root hair, cell and its surroundings, name the parts that correspond to
- concentrated sugar solution
- parchment paper
- water in the beaker
- Name any other material that can be used instead of parchment paper in the above experiment.
- Mention two advantages of the process for the plants.
A leaf cell of a water plant was placed in a liquid other than pond water. After sometime, it assumed a shape as shown below:
Comment on the nature (tonicity) of the liquid surrounding the cell.
Give Reasons for the following.
It is necessary to maintain a normal osmotic concentration of the blood.
Give Reasons for the following.
On sprinkling common salt on grass growing in a lawn, the grass is killed.
Give Technical Term for the following.
A solution whose concentration is greater than that of the cell sap.
Mention, if the following statement is True or False. If false rewrite the wrong statement in its correct form:
During exosmosis, water moves from inside the cell to the outside of the cell.
Fill in the Blank
A plasmolysed cell has __________ protoplast.
Multiple Choice Question:
Osmosis involves:
