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प्रश्न
Make sketches of animal and plant cells which you observe under microscope.
उत्तर
- Plant cell:
- It is usually larger in size. It is hard in nature.
- Plant cells have a cell wall in addition to their cell membrane.
- Plant cell have chloroplast which contains chlorophyll
- Plant cells have large vacuoles. Centrioles are absent.
- Animal cell:
- Animal cells are generally smaller than plant cells. It is not so hard as plant cells.
- A cell wall is absent.
- Chloroplast is usually absent.
- An animal cell may have many small vacuoles.
- Centrioles are found in animal cells.
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संबंधित प्रश्न
What is osmosis?
Give a brief account of discovery of the cell.
A plant cell can be identified from an animal cell by the :
Name the part of the cell concerned with the following :
The entry of only certain substances into and out of the cell.
Try to find the names of four cell organells hidden in this maze, (hint: The hidden words can appear horizontally or vertically; forwards or backward or even mixed up). Write them in the lines provided. For example : “NUCLEUS” in the last row, seven backward letters.
| A | J | F | B | H | E | M | O | E | L | O | U | C | A | V |
| H | V | L | E | U | C | O | P | L | A | S | T | N | O | E |
| C | H | R | O | M | O | P | L | A | S | T | X | T | E | R |
| S | U | E | L | C | U | N | W | P | L | A | S | T | I | D |
Fill in the blanks:
Organisms which are made up of a single cell are called ______ organisms.
What was the contribution of the following to our knowledge of cells?
Virchow
Fill in the blank with a suitable word:
The single-celled alga ______ measures 10 cm in length.
Sketch and describe in your own words, the animal cell
When will you use a simple microscope and when, a compound microscope? Explain in detail how you will use them.
