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The Fundamental Unit Of Life
The cell theory stated that all plants and animals are composed of cell and that cell is the basic unit of life and that all cells arise from pre-existing cells.
Who discovered cell and how?
Robert Hooke discovered cell. He looked on to a piece of cork through his self-designed microscope. He saw small boxes in the shape of a honeycomb and thus he named them cell that means a little room.
The organisms that have only one cell but that cell perform all the life functions like respiration or reproduction etc.
The organisms which are made up of many cells. These cells perform specific functions and make tissues then organs and organ system and perform all the functions of life.
Movement of particles from a region of high concentration to a region of low concentration is diffusion.
It is the movement of water from a region of high concentration through a semi-permeable membrane to a region of low water concentration.
Solution outside the cell is dilute. The cell will gain water as the solution has more water than the cell.
If the solution has exactly the same amount of water as the cell there will be no movement of water.
If the solution has less concentration of water than the cell, the cell will loose water by osmosis.
The phenomenon of shrinkage of protoplast from the cell wall due to exosmosis in a plant cell when placed in a hypertonic solution is called plasmolysis.
How do substances like co2 and water move out of the cell?
These substances move out by the process of diffusion and osmosis.