Question

question 18
which statement best summarizes describes cell theory?
all living things are made up of cells that can come from non - living matter.
not all living things are made from cells, and some animal cells come from plants.
all living things are made up of cells, and each cell comes from another living cell.
living things can form from cells or other materials.

Explanation:

Cell theory has three main tenets: all living organisms are composed of cells; the cell is the basic unit of life; and cells arise from pre - existing cells.

• The first option is incorrect because cells come from pre - existing cells (living matter), not non - living matter.
• The second option is wrong as all living things are made of cells, and animal and plant cells have their own distinct origins.
• The fourth option is incorrect since living things are made of cells, and cells are the fundamental unit (not other materials).

Answer:

All living things are made up of cells, and each cell comes from another living cell.