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प्रश्न
Write down differences between organ and organelle.
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उत्तर
| Organs | Organelles |
| 1. They are found in multicellular organisms. | 1. They are found in all eukaryotic cells |
| 2. They are large sized or macroscopic. | 2. They are very small sized, either microscopic or submicroscopic. |
| 3. They may be external or internal to the body of an organisms. | 3. They are mostly internal (i.e., intracellular). |
| 4. The organs are formed of tissues, tissues comprise of cells and cells are formed of organelles. | 4. An organelle is made up of micromolecules and macromolecules. |
| 5. Organs coordinate to form organ systems, while organ systems form the body of an organism. | 5. Organelles coordinate to produce the cell. |
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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.
State the difference between eukaryotes and prokaryotes
Differences between light microscope and electron microscope.
A plant cell has a cell wall made of :
Match the name of the organelle given in Column A with its function given in Column B.
| Column A (Organelle) | Column B (Function) | ||
| 1 | leucoplast | a | help in cell division |
| 2 | nucleus | b | transport of material |
| 3 | ribosomes | c | making food |
| 4 | mitochondria | d | digesting foreign bodies |
| 5 | endoplasmic reticulum | e | storage of starch and proteins |
| 6 | golgi bodies | f | making the cell turgid |
| 7 | chloroplast | g | making proteins |
| 8 | centrosome | h | controlling all the vital activities of a cell |
| 9 | vacuole | i | releasing energy |
| 10 | lysosomes | j | synthesis of cell wall in a plant cell |
Write a short answer.
Why are mitochondria called the powerhouse of the cell?
Why was the invention of the microscope so important to the study of living beings?
Who studied the cell first?
Which is the smallest cell?
What is a 'cell'?
