Question

What do the dark spot represent in the onion epiderms , when observed under the microscope.

Answer 1

Answer:

Explanation:

it is the nucleus present in the onion cells

Answer 2

Answer:

The dark spot represent nucleus in the onion epiderms , when observed under the microscope.

Explanation:

• To make the mount or specimen visible under the microscope in, staining is a widely used technique.
• When observed under a microscope, it increases contrast.
• The cell wall of an onion cell will become more translucent by being stained.
• Saffranine is used to produce a temporary mount of the onion.
• When examined under a microscope, a large number of rectangular cells with unique cell walls may be seen.
• The cytoplasm, a thin layer of a dark-colored substance, is found on the interior of the cell wall.
• A sizable central vacuole is present in the cell.
• The nucleus, a spherical body that is heavily pigmented, is present in every cell.
• Cell nuclei will get stained in crimson.

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