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प्रश्न
What was the contribution of the following to our knowledge of cells?
Schwann
उत्तर
Schwann observed that all animal cells are basically similar and lack cell wall.
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संबंधित प्रश्न
Who discovered cells and how?
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.
Write down differences between organ and organelle.
Differences between light microscope and electron microscope.
Fill up the blank with the terms given below
The ____ is the structural unit of all living things
What is cell theory? Name the three scientists whose work led to the formulation of the cell theory.
What is the function of the following?
Ribosomes
Match the items in column A with the appropriate items in column B:
| column A | column B |
| 1. Platform or workplace for the synthesis of proteins | a. Golgi complex |
| 2. A powerhouse of cells | b. Ribosomes |
| 3. Help in the formation of cell plate during cell division | c. Chloroplast |
| 4. Site for photosynthesis | d. Mitochondria |
| 5. Control tower of cell | e. Chromosomes |
| 6. A structure bearing genes | f. Nucleus |
the question has four options. Choose the correct answer:
The word cell was given by
Robert Hooke published a book named ______ in the year 1665.
