Why are stem cells important for the development of a multicellular organism? What do they allow the organism to do?

Stem cells are primal cells found in all multi-cellular organisms. They retain the ability to renew themselves through mitotic cell division and can differentiate into a diverse range of specialized cell types.

Explanation:

In adult organisms, stem cells and progenitor cells act as a repair system for the body, replenishing specialized cells.

geologic time scale (for gradpoint) =)

photosynthesis makes the glucose that is used in cellular respiration to make atp. the glucose is then turned back into carbon dioxide, which is used in photosynthesis. while water is broken down to form oxygen during photosynthesis, in cellular respiration oxygen is combined with hydrogen to form water.