Friday, 18 October 2013

What is the general shape of an onion cell?

The general shape of an onion cell is square or rectangular.  The interior of the cell is easy to see and focuses well for microscopic observation.  Onion cells fit together like pieces of floor tile, which is sort of what you would expect to see in a layering effect.  Onions are composed of plant cells, which normally would have chloroplasts present to facilitate the process of photosynthesis.  The onion bulb usually grows underground, and is...

The general shape of an onion cell is square or rectangular.  The interior of the cell is easy to see and focuses well for microscopic observation.  Onion cells fit together like pieces of floor tile, which is sort of what you would expect to see in a layering effect.  Onions are composed of plant cells, which normally would have chloroplasts present to facilitate the process of photosynthesis.  The onion bulb usually grows underground, and is fed by the stalk like green top part.  Onion cells are easily wet-mounted on microscope slides, and contrast their structures nicely when applied with wet-mount stain.  Onions are multicellular, which means they have multiple cells.  They are also eukaryotic, indicating the presence of a nucleus, in which the cellular DNA is housed.  Since the cells are eukaryotic, onion cells undergo mitosis, which is a process of cell division in multicellular eukaryotes.

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