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प्रश्न
Osmosis and diffusion are the same except that osmosis there is:
विकल्प
a freely permeable membrane
a cell wall in between
a selectively permeable membrane in between
an endless inflow of water into a cell
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उत्तर
a selectively permeable membrane in between
संबंधित प्रश्न
Give reason for the following:
Potato cubes, when placed in water, become firm and increase in size.
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:
Redraw in the space provided, the diagram of the cell if it is soon placed in ordinary water for some time.
Give at least three uses of water to green plants
What is the significance of diffusion?
Give Technical Term for the following.
The pressure which is responsible for the movement of water molecules across the cortical cells of the root.
Name the following:
The movement of a liquid through a selectively permeable membrane.
Fill in the Blanks
Diffusion is the movement of molecules from a region of their ________ concentration to the region of their ________ concentration.
Mention, if the following statement is True or False. If false rewrite the wrong statement in its correct form:
Cells that have lost their water content are said to be deplasmolysed.
Multiple Choice Question:
When a plant wilts, the sequence of events will be as follows:
