Advertisements
Advertisements
Question
Who discovered the cell in 1665?
Advertisements
Solution
The English scientist Robert Hooke discovered the cell in 1665 from cork slices kept under a microscope.
APPEARS IN
RELATED QUESTIONS
Make a comparison and write down ways in which plant cells are different from animal cells.
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.
A plant cell can be identified from an animal cell by the :
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 is a cell called the structural unit of a living organism?
What is the function of the following?
Cell membrane
Answer the following question.
Who discovered cells, and how?
The instrument used to observe the cell is _____
