<span>Nearly 99 percent of the
glacial ice on Earth is found in its polar regions, north of 35 degrees
North latitude and south of 35 degrees South latitude. However, glaciers can be found in some form on every continent except for Australia</span>
For this problem, I think you missed to include the observation or the result of the incubation that has to be shown. However, I think that this problem is talking about not just a single species growing in the plate. This is due to unsterilized materials used and/or in the contamination from the procedure of the streaking itself.