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A catalyst refers to many types of different molecules or chemicals which can reduce the activation energy of a reaction without being used up itself. Activation energy is the minimum ene...

The process of cell division is called the cell cycle. G1 phase - Cell grows in size and cellular contents (e.g. organelles) duplicate so that the new cells will have enough to function. S phase - The ch...

Diffusion is the movement of particles, either in gas or solution, from an area of high concentration to an area of low concentration until the concentration in the whole area is equal. This also occurs a...

capillaries have a high surface area to volume ratio to allow fast diffusionCO2 can diffuse from cells to blood plasmathe lungs also contain capillaries allowing CO2 to diffuse into them prior to exhalati...