Final answer:
Using a light microscope, Abby could observe Amoeba, Algae, Paramecium, and Rotifer in the pond water sample. These organisms are large enough to be seen with the microscope, which is ideal for viewing living specimens, although staining may be required for better visibility of cell components. All options are correct.
Step-by-step explanation:
Abby could potentially observe various organisms in the pond water sample using a light microscope. These organisms include:
- Amoeba, are single-celled organisms with a flexible shape.
- Algae, are photosynthetic and can be single-celled or multicellular.
- Paramecium is a type of single-celled ciliate protozoan.
- Rotifer is a slightly larger, multicellular organism that lives in freshwater.
A light microscope uses visible light to enable the user to see specimens and is particularly advantageous for viewing living organisms. However, since individual cells are generally transparent, their components might not be distinguishable unless they are colored with special stains, which typically kill the cells. The smallest organisms visible under the microscope are bacteria, but other microscopic organisms like fungi, algae, and protozoa can be observed using a high-power objective for better magnification. All options are correct.