To focus the microscope, Stella slowly turns the coarse adjustment knob, moving the stage and slide closer and closer to the objective lens. Within seconds Stella sees microscopic pond water specimens whirling around on the slide! By rotating the objective lenses, Stella increases the magnification power of the microscope to 100X and then to 400X. She focuses in on one organism, a paramecium. Paramecia are single-celled protists that are naturally found in aquatic habitats.
Watch this video to see what Stella sees.
Stella then uses a prepared slide to analyze additional paramecia. The following images show how Stella’s view of the prepared paramecia cells changes as she increases the magnification of her microscope.
prepared slide: Prepared slides are usually made by scientists in a laboratory using special techniques that allow the specimens or cells to be in a thin, single layer and spaced apart from one another. Prepared slides are also typically stained, or dyed, in various colors to highlight certain structures. In addition, prepared slides are treated with chemicals so that the specimens do not decay and the slides can be reused for decades.


Describe how Stella’s view of these cells and their parts changed as she transitioned through the three levels of magnification. Identify at least one cell structure or function of the paramecium in your description.

https://asupd-curriculum-prod.s3.us-east-2.amazonaws.com/V2+and+Vendor+Courses/Edmentum/Science/Authentic+Assignments/Biology+B/31781959-ParameciumCaudatum_hd.mp4

the video if you need it ^^^