Question

select all that apply which of the following are the main points of the cell theory? cells are the smallest living things. cells arise only by division of a previously existing cell. all living organisms are composed of at least 2 cells. all cells have either mitochondria or chloroplasts. all living organisms are composed of one or more cells. need help? review these concept resources.

Explanation:

The cell theory has three main points: cells are the basic unit of life (cells are the smallest living things), all living organisms are made of one or more cells, and cells come only from pre - existing cells. Single - celled organisms exist, so not all living organisms are composed of at least 2 cells. Also, not all cells have either mitochondria or chloroplasts (e.g., prokaryotic cells lack these membrane - bound organelles).

Answer:

Cells are the smallest living things.
Cells arise only by division of a previously existing cell.
All living organisms are composed of one or more cells.