Describe the answers to the following questions with explanation.
Answer variants:
Clean toothpick
They are made up of cells
Brain
To increase contrast and make the nucleus visible
It prevents the cells from drying
To protect the sample and avoid air bubbles
Why are specific materials and steps essential in observing cheek cells?
1. What is the role of glycerin in preparing the cheek cell slide?
2. Why is a coverslip placed over the sample?
3. Which tool is used to collect cheek cells safely?
4. What is the main purpose of adding methylene blue stain?
5. What does the observation of cheek cells confirm about animal bodies?