-Who discovered cell and how?
-Who discovered the first microscope and when?
-deifferenciate diffusion and osmosis?
-why cell is called structurall and functional unit of life?
-Who discovered cell and how?
-Who discovered the first microscope and when?
-deifferenciate diffusion and osmosis?
-why cell is called structurall and functional unit of life?
1. Scientist Robert Hooke discovered cell in 1665. While observing a thin slice of cork under microscope he saw several pores that were separated by walls surrounding each of them. Hooke named them ‘cell’. As cork bears dead cells he could not give any description of nucleus or cytoplasm.
2. The first microscope was invented by Zacharias Janssen in 1590 in Middelburg, Netherlands.
3.
Osmosis
Diffusion
Osmosis is the movement of water molecules from a region of lower solute concentration to higher through a semi permeable membrane.
It is the movement of particles in a solution from higher concentration area towards area of lower concentration.
It occurs when the cell is placed in a medium with lower solute concentration.
It mostly occurs within gas molecules and liquid molecules.
Water is necessary for movement.
Water is not necessary.
Osmosis is the transportation of water.
Diffusion is the transportation of any solute like oxygen, carbon dioxide, salt etc.
Osmosis is a slow process.
Diffusion is a quick process which occurs rapidly.
Osmosis occurs over short distance.
Diffusion occurs over any distance.
1. Scientist Robert Hooke discovered cell in 1665. While observing a thin slice of cork under microscope he saw several pores that were separated by walls surrounding each of them. Hooke named them ‘cell’. As cork bears dead cells he could not give any description of nucleus or cytoplasm.
2. The first microscope was invented by Zacharias Janssen in 1590 in Middelburg, Netherlands.
3.
Osmosis | Diffusion |
Osmosis is the movement of water molecules from a region of lower solute concentration to higher through a semi permeable membrane. | It is the movement of particles in a solution from higher concentration area towards area of lower concentration. |
It occurs when the cell is placed in a medium with lower solute concentration. | It mostly occurs within gas molecules and liquid molecules. |
Water is necessary for movement. | Water is not necessary. |
Osmosis is the transportation of water. | Diffusion is the transportation of any solute like oxygen, carbon dioxide, salt etc. |
Osmosis is a slow process. | Diffusion is a quick process which occurs rapidly. |
Osmosis occurs over short distance. | Diffusion occurs over any distance. |
