Animated Biology Notes

Light microscope
Light passes through one or more lenses to produce an enlarged image of a specimen
Electron microscope
Forms an image of a specimen using a beam of electrons rather than light
Quality of making an image appear larger than its actual size
Measure of the clarity of an image
Scanning tunneling microscope
Uses a needle-like probe to measure differences in voltage caused by electrons that leak, or tunnel from the surface of the object being viewed
Three parts of Cell theory
All living things are made of one or more cells
Cells are the basic units of structure and function in organisms
All cells arise from existing cells
Cell membrane 
Outer boundary, encloses and separates the cell interior from its surroundings
Cell interior
The cellular structures on which proteins are made
Microscopic fibers within the cytoplasm, cell structures suspended on these
Single-celled organism that lacks a nucleus and other internal compartments