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प्रश्न
Write true or false for each statement. Rewrite the false statements correctly:
Growth and reproduction are based on cell division
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उत्तर
True
APPEARS IN
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.
Name the part of the cell concerned with the following :
The entry of only certain substances into and out of the cell.
State whether the following statement is true (T) or False (F):
Genes are located on a chromosome.
What is the name of the chemical substance which constitutes the genes?
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 |
What was the contribution of the following to our knowledge of cells?
Robert Hooke
What was the contribution of the following to our knowledge of cells?
Schwann
When will you use a simple microscope and when, a compound microscope? Explain in detail how you will use them.
Write about the contribution of Robert Hooke in cell biology.
Robert Hooke published a book named ______ in the year 1665.
