You receive a sample slide of an organism. While observing it under a microscope, you notice that the organism is single-celled and green in color. There are multiple individual organisms on the slide. Based on this initial information, you guess that it is either a bacterium or a protist. Which trait is least likely to help you identify the correct group of this organism? (1 point)

the presence of cell structures in the cell
the absence of a nucleus
the presence of different cell shapes
the absence of cell structure membranes

The absence of a nucleus is least likely to help you identify the correct group of this organism. Both bacteria and protists can have a nucleus or lack one, so this trait is not specific enough to differentiate between the two groups. The presence of cell structures, different cell shapes, and the absence of cell structure membranes can all be more characteristic features that can help in distinguishing between bacteria and protists.