1. Nucleus is separated from cytoplasm by

2. The liquid material in the nucleus is

3. Tissues combine to form

4. Cells present in living organism differ in

5. Cells which lack nuclear membrane are

6. The control centre of all the activities of a cell is

7. The coloured organelles which are found in plants only are

8. Genes are located in

9. A group of similar cells combine to form

10. The organism containing only a single cell is called