The problem in the image could be caused by the use of a warped cover slip

• A. Use of a warped cover slip
• B. Using a properly matched cover slip
• C. Correct mounting medium
• D. Adequate differentiation

Answer: (A)

Warped cover slips create uneven contact with the tissue, so the mounted section is not truly flat. This leads to variations in thickness across the slide and shifts in the focal plane, causing distortion of detail and light transmission. In the image, you’d see artifacts like areas that appear bent, wavy, or out of focus because the warp changes how light passes through the specimen. If the cover slip were properly flat, it would sit evenly and the image would be much more uniform. The mounting medium and the staining/differentiation steps influence staining quality and clearing, not the physical distortion caused by a warped cover slip.