Question

All living things are made up of one or more ______.

Answer 1

D. cells

All organisms as hypothetically asserted by the cell theory states that all species that roams the earth is made up of cell/s.
One-celled organisms are called prokaryoties while the multiple-celled organisms are called the eukaryotes.

Cell in definition is the simplest foundation and framework of every lingering specie in the biosphere. 

Answer 2

The answer is D.

All living things are made up of one or more Cells. While there are some species of single cell organism such as Amobae or Algae,

Humans are more complex than that. We have a staggering 37.2 Trillion Cells, which make us one of the most complicated creatures on the planet earth.