What are the answers to these biology fill-in-the-blank and true/false questions about microscopes and cell structures?

Here are the answers to the fill-in-the-blank and true/false questions from the image:

1. The part of the microscope where the specimen is placed for viewing is called the stage.
2. The difference between smooth and rough endoplasmic reticulum is that Rough ER is attached with ribosomes.
3. If you want to see protozoans in pond water using the microscope, the steps are:
   • Prepare a wet mount slide of the pond water sample.
   • Place the slide on the microscope stage and focus under low power using the coarse adjustment knob.
   • Switch to a higher power objective lens and use the fine adjustment knob for detailed viewing.
4. The major external difference between tilapia and catfish is that catfish possess prominent barbels (whiskers) around their mouths, which tilapia typically lack.
5. One organelle that is absent in animal cells but present in plant cells is the cell wall (or chloroplast).
6. One organelle that