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Answers
Answer:These are very basic questions and are given in ncert of 11th class biology.
Explanation:
1.Robert Brown discovered the Nucleus in 1839
2. Cell is the structural and functional unit of life. It is the building block of any organisms. Nothing other than a cell can exist independently.
3. Organisms having single cell are unicellular, while those having multiple cells are called multicellular. Ex- Unicellular-Amoeba, Multicellular- animals
4. The difference is of the number of cells that build the organism. If it is single cell, then unicellular, or if many cells, then it is multicellular.
5. Yes, the shape of cell is related with its function. Example- we have to conduct signals to long areas, hence our neurons are longer, whereas the mesophyll cells are round in shape to facilitate maximum light absorption from sun.