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प्रश्न
Give Reasons for the following.
Freshwater fish cannot survive in seawater.
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उत्तर
The seawater is saline (having more concentration of salts) and acts as a hypertonic solution for the freshwater. So freshwater fish cannot survive in seawater as it causes the plasmolysis of the cells of the fish and ultimately the fish will die.
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संबंधित प्रश्न
Osmosis and diffusion are the same except that osmosis there is:
Explain why:
We gargle with saline solution in case of throat infection.
Two potato cubes each 1 cm3 in size, were placed separately in two containers (A and B), the container A having water and the other (B) containing concentrated sugar solution. After 24 hours when the cubes were examined, those placed in water were found to be firm and had increased slightly in size and those placed in concentrated sugar solution were found to be soft and somewhat decreased in size. Use the above information to answer the questions that follow:
Name and define the physical process being investigated in this experiment.
Define the cohesive force.
Differentiate between:
Osmosis and Diffusion
Name the following:
Name the process by which water enters the root hair cell.
Name the following:
The process by which raisins swell up when placed in a beaker of water.
Mention, if the following statement is True or False. If false rewrite the wrong statement in its correct form:
Osmosis is defined as the movement of water from a concentrated sugar solution to a dilute sugar solution.
Multiple Choice Question:
In the process of osmosis in a cell:
Name the two organelles in a plant cell that contain their own genetic material and ribosomes.
