A student was viewing a prepared slide of a plant cell under high power microscope. The features of the cell were blurred. Which one of the labeled parts of the microscope would the student use to obtain a sharper outline of the features.

a)
The student's answer is correct.
To obtain a sharper outline of the features when viewing under high power, the student would use the fine adjustment knob.

b)
The formula used to calculate magnification in a light microscope is:

$$\text{Total Magnification} = \text{Magnification of Eyepiece Lens} \times \text{Magnification of Objective Lens}$$

So, the formula is:

$$\boxed{\text{Total Magnification} = \text{Eyepiece Magnification} \times \text{Objective Magnification}}$$

c)

i) Cutting a very thin section:
This is done to allow light to pass through the specimen, making it transparent enough for observation under the microscope.

ii) Staining the section:
Staining is done to add color to specific cell structures (like the nucleus or cytoplasm), making them more visible and distinguishable from each other.

iii) Putting the section in water:
This step is taken to prevent the specimen from drying out and to keep it flat, which helps maintain its natural structure and allows for clear viewing.