A researcher discovers a new microfossil. At first, he is uncertain whether he has found a fossilized bacterium, archaeon, or protist. After careful study, he determines that it is a fossilized protist. What features were present in this microfossil that led the researcher to this conclusion?

This microfossil contained morphologically complex cell walls

Explanation: Microfossils are a very important class of fossils which are very useful in teaching science students especially as they easily learn through what they see with their naked eyes.

Microfossils are also useful in the oil, mining, geology and engineering, and other fields connected to the environment. Microfossils are always available in large amounts in Sedimentary rocks.

The pyramids of Egypt are made of sedimentary rocks, for example, that consist of the shells of foraminifera, a major microfossil group.

Microfossils contain several microorganisms which includes Bacteria,protists etc fossilized protist are known to posses complex external walls.