All living things are made of cells which are differentiated to perform different functions. Substances move into or out of the cell and enzymes are catalysts contributing to cell metabolism.

Most living things depend on photosynthetic cells ... These sugar molecules are the basis for more complex molecules made by the photosynthetic cell, such as glucose. Then, via respiration ...

Cells are the fundamental unit of all living things. Specialised plant cells have ... Just like animals, plants are made of tiny little cells. Like animal cells, basic plant cells have a nucleus ...