Question

order the following choices to reflect the relative sizes of microorganisms as compared to each other, ranging from the largest to the smallest (1 being the largest).
viruses
protozoa
helminths
most bacteria

Explanation:

Helminths are multicellular parasites and are the largest among these. Protozoa are single - celled eukaryotes, larger than most bacteria. Most bacteria are larger than viruses which are acellular and the smallest of these microorganisms.

Answer:

1. Helminths
2. Protozoa
3. Most bacteria
4. Viruses