The clear epidermal cells exist in a single layer and do not contain chloroplasts, because the onion fruiting body (bulb) is used for storing energy, not photosynthesis. The vacuole is prominent and present at the center of the cell, surrounded by cytoplasm. Firm, small onions are best for microscopy.

Parenchymal cells must contain chloroplasts, because chloroplasts can be formed only from other chloroplasts, back to the first chloroplast in existence. The chloroplasts in onion parenchyma are not obvious because they’re not expressing chlorophyll.

What structures do the Elodea cells have that the red onion skin cells lack? They have chloroplasts because they need the chlorophyll to produce ATP energy from the sun (for food). Onions are underground and do not have access to the sun, so they lack chloroplasts.

Onion cells are not green. They get no light, so do not need chloroplasts. appear mainly around the outside of the cell because the central vacuole takes up most of the space and pushes them to the outside.

Answer. An onion cell is approximately 0.13mm long and 05mm wide. An elodea cell is approximately 05mm long and 025mm wide.

a modified, usually subterranean shoot with a greatly shortened stem and fleshy scalelike leaves. Bulbs store water and nutritive substances (primarily sugars); they are also a means of vegetative renewal and reproduction.

The advantages of asexual reproduction include: the population can increase rapidly when the conditions are favourable. it is more time and energy efficient as you don’t need a mate. it is faster than sexual reproduction.

– Grafting is not the natural method of vegetative propagation. – It is a method that is done in horticulture to produce different varieties of plants.

Natural methods of asexual reproduction include strategies that plants have developed to self-propagate. Many plants, such as ginger, onion, gladioli, and dahlia, continue to grow from buds that are present on the surface of the stem.

Reproduction (or procreation or breeding) is the biological process by which new individual organisms – “offspring” – are produced from their “parent” or parents. Reproduction is a fundamental feature of all known life; each individual organism exists as the result of reproduction.

For successful grafting to take place, the vascular cambium tissues of the stock and scion plants must be placed in contact with each other. Both tissues must be kept alive until the graft has “taken”, usually a period of a few weeks.

Coding tip: Note the three types of skin grafts

• Autograft-using the patient’s own skin.
• Allograft-using skin obtained from another person.
• Xenograft-free skin grafts obtained from a non-human source (usually a pig)