I think the answer is vibrssae or whiskers.
Does this link help?
Link: https://bscb.org/learning-resources/softcell-e-learning/endoplasmic-reticulum-rough-and-smooth/
Answer:
The difference is that the ones with dots have more cells in them and the other one must've been left there for awhile
Explanation:
Because i looked up what those dots meant
Watershed is the place where water of rain and snow get stored. The watershed contains surface water-and wetlands--and all the underlying ground water,lakes, streams, reservoirs. Lake is the major component of the watershed . The watershed can be used for various purpose like dams, hydrological modification etc.