Question

1. you are observing an unknown organism under the microscope. by careful observation you have found that the organism is unicellular and prokaryotic in nature. which hypothesis among the following is the likely explanation for the observation?

the unknown organism is a plant cell.
the unknown organism is a fungal cell.
the unknown organism is an animal cell.
the unknown organism is a bacteria.

Explanation:

Plant cells, fungal cells, and animal cells are eukaryotic (have a nucleus and membrane - bound organelles). Bacteria are prokaryotic (lack a nucleus and membrane - bound organelles) and can be unicellular.

Answer:

The unknown organism is a bacteria.