The displacement of an object can be less than or equal to the distance covered by the object because the magnitude of the displacement is not equal to the distance. This can happen if the motion is along a straight ...

Absolutely true, Osmosis, is the movement of water (molecules) by a selectively permeable membrane. It is the passage of water from an area of high-water concentration to an area of low water concentration through a semi-permeable membrane.

The plasma membrane allows the entry and existence of certain materials in and out of cells. Hence, it is called selectively permeable membrane.

All we know that every cell performs in our body. And after being cell dead it throws out from the body. Remember, shape & size of cells are related to the specific function as they perform.

True, Rudolf Virchow modified the cell theory in 1855. He gave the postulelate, “Omnis cellula-e-cellula”, which means, a new cell arise from pre-existing cells.