Question

While preparing a good temporary mount of leaf peel to observe stomata, care should be taken to avoid:
(1) adding glycerine to the slide
(2) using water to wash the slide
(3) having air bubbles in the slide
(4) staining the peel with safranin

Answer 1

A good temporary mount of leaf should be free of any air bubbles. These air bubbles lower the viewing resolution. Thus, all precautions should be taken to avoid having air bubbles in the slide.

Hence, the correct answer is option 3.