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प्रश्न
Name the part of the cell concerned with the following :
The entry of only certain substances into and out of the cell.
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उत्तर
Cell membrane
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संबंधित प्रश्न
Carry out the following osmosis experiment:
Take four peeled potato halves and scoop each one out to make potato cups. One of these potato cups should be made from a boiled potato. Put each potato cup in a trough containing water. Now,
- Keep cup A empty
- Put one teaspoon of sugar in cup B
- Put one teaspoon salt in cup C
- Put one teaspoon sugar in the boiled potato cup D.
Keep these for two hours. Then, observe the four potato cups and answer the following:
- Explain why water gathers in the hollowed portion of B and C.
- Why is potato A necessary for this experiment?
- Explain why water does not gather in the hollowed-out portions of A and D.
Give a brief account of discovery of the cell.
A plant cell has a cell wall made of :
Name the scientist who invented the first microscope.
Where are the genes located in a cell?
Why was the invention of the microscope so important to the study of living beings?
Which is the longest human cell?
Make sketches of animal and plant cells which you observe under microscope.
Robert Hooke published a book named ______ in the year 1665.
Who proposed the "Cell theory"?
