respiration
physical change
Boiling potatoes is a physical change, not a chemical change. The heat causes the starch in the potatoes to gelatinize and the cells to rupture, but the chemical composition of the potatoes remains the same.
The biggest advantage of chemical change is life. All organisms are alive because of the sum total of all the chemical reactions occurring in their cells.
The Chloroplasts
Green plant cells change light energy into chemical energy.
The chemical energy stored in food becomes useful to you when it is converted into adenosine triphosphate (ATP) molecules through cellular respiration in your body's cells. ATP is the energy currency used by your muscles and all other cells for various physiological functions, including muscle contraction.
The browning of a flower is a chemical change. Color changes are one sign of a chemical reaction.
This is a chemical change. When oxygen binds to hemoglobin, it forms a new compound with a different chemical composition. This process involves breaking and forming chemical bonds.
Nerve cells are specialized cells for neuron function by bio chemical ion diffusion to transmit electrical impulses as information from neural cortices to muscles/organs for coordination of body function.
Grape juice contains mostly glucose (C6H12O6) and wine also has ethanol (C2H5OH). The ethanol is produced by fermentation of glucose by yeast cells. This is a chemical change.
Growing hair is a biological process that involves physical changes. Cells in hair follicles divide and differentiate to produce new cells, which then form hair strands. This process does not involve a chemical reaction that alters the chemical composition of the hair.