Single-celled ( unicellular ) organisms like bacteria are obviously composed of just one cell, whereas multicellular organisms can be composed of trillions of cells.
(Single-celled ( unicellular ) organisms like bacteria; are obviously composed; of just one cell) (multicellular organisms; can be composed; of trillions of cells)
Single-celled ( unicellular ) organisms like bacteria multicellular organisms
are obviously composed can be composed
of just one cell
of trillions of cells