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Why is the plasma membrane called a selectively permeable membrane?
The plasma membrane allows or permits the entry and exists of some materials in and out of the cell. It also prevents movement of some other materials. The cell membrane, therefore, is called a selectively permeable membrane.
State the difference between eukaryotes and prokaryotes.
Where are chromosomes found in a cell? State their function.
‘Cells are the basic structural units of living organism.’ Explain.
Explain why chloroplasts are found only in plant cells?
Complete the crossword with the help of clues given below :
Across
1. This is necessary for photosynthesis.
3. Term for component present in the cytoplasm.
6. The living substance in the cell.
8. Unit of inheritance present on the chromosomes.
Down
1. Green plastids.
2. Formed by collection of tissues.
4. It separates the contents of the cell from the surrounding medium.
5. Empty structure in the cytoplasm.
7. A group of cells.
Who discovered cell?
Name three important parts of cell.
In which cells, cell wall is present?
Give three examples of unicellular organisms.
Where are chromosomes present in a cell?
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