Metabolism, far from being just a housekeeping function, underlies all changes in cell size and function ...

Animal and plant cells have different energy-producing structures inside them. For animals, that’s mitochondria, which convert chemical energy from food into a form that our cells can use. Plants and ...

This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated. The U.S. government is allowing the sale of ...