Question

multiple choice 1 point when examining onion epidermal cells, the iodine stain makes which structure more visible? chloroplasts vacuole cell membrane nucleoli clear my selection

Explanation:

Iodine stains the nucleus of onion epidermal cells, making it more visible under a microscope. Among the given options, the nucleoli are part of the nucleus and become more prominent with iodine - staining. Onion epidermal cells are plant cells but do not have chloroplasts (they are not in a photosynthetic part of the plant), the cell membrane is not typically stained clearly by iodine, and the vacuole is not the main structure stained by iodine.

Answer:

Nucleoli