They are inorganic. They all have chlorophyll. They are composed of cells. They all feed off other organisms.
I gave my students this multiple choice question: Which of these is true of algae, bacteria, and flowering plants?

Only one answer is correct among these 4 choices:
- They are inorganic.
- They all have chlorophyll.
- They are composed of cells.
- They all feed off other organisms.

Could you tell me which one is correct?

They are composed of cells.