Question

there are three parts to the cell theory. which is not one of those parts? all organisms are composed of one or more cells. cells spontaneously arise from carbon and nutrients carried in the bloodstream. the cell is the basic unit of structure and organization in organisms. all cells come from pre - existing cells.

Explanation:

Cell theory states all organisms are composed of cells, cells are basic units, and new cells come from pre - existing ones. Cells don't arise spontaneously.

Answer:

Cells spontaneously arise from carbon and nutrients carried in the bloodstream.