Which of the following organisms is a prokaryote?

amoeba

influenza A virus

charophyte algae

E. coli

The correct answer will be option - E. coli.

Explanation:

The organism on earth are classified in two groups - the primitive group called prokaryotes and advanced group called eukaryotes.

The prokaryotic cells are simple unicellular organisms which are not highly organized as they lack certain organelles needed to do important functions in the cell. The Eukaryotic cells are highly organized cells with organelle especially a distinct nucleus.

All organisms except bacteria and Archea are eukaryotic organism so from the given options - E. coli is the prokaryote as it is a bacteria and left options are eukaryotes except virus which is not considered either living nor non-living.

Thus, option-E. coli is the correct answer.