Question

an organism made up of only one cell is called...
multicellular
unicellular

Explanation:

To solve this, we recall the definitions of the terms. "Multicellular" refers to organisms with many cells, while "unicellular" refers to organisms with a single cell. The question asks for an organism made of one cell, so we identify the correct term.

Answer:

unicellular (the option with the text "unicellular")