Explain why chloroplasts are found only in plant cells?
Chloroplasts are only found in plant cells because they are required for the food making process of plants called photosynthesis. The chloroplasts contain chlorophyll which traps solar energy and utilize it for making food. Since animals do not synthesize food they do not have chlorophyll.
‘Cells are the basic structural units of living organism.’ Explain.
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.
Where are chromosomes found in a cell? State their function.
