Answer:
Cell is made of molecules whereas atoms make up molecules. Cells are the smallest functioning unit in a living organism.
Atom is the smallest unit of matter. Usually, a cell is on the micrometer scale while an atom is in the angstrom scale .
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That would be a plant. Like a tree, Flower, Hedge, etc. That is because of Photosynthesis. Photosynthesis is a chemical reaction that makes compounds (glucose) by capturing light from its leaves, and water from its roots.
Hope this helps.
I believe the answer is a, b, c, and e. So sorry if I am wrong!
All bacteria and viruses are unicellular, Euglena, Amoeba, Paramoecium are unicellular.
I hoped I helped!