plant cell question

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nanoscaled
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plant cell question

Post by nanoscaled » Thu Nov 16, 2006 7:40 am

I have a couple questions about plant cells:

How does chloroplast move throughout the cell, and where is it located?

Also I am having trouble distinguishing the difference between an elodea cell and an onion cell.

that is it, thank you for taking your time answering,
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Post by Dr.Stein » Thu Nov 16, 2006 8:40 am

- Imagine this: Boats are sailing throughout the ocean. Boats are chloroplasts, ocean is the cytoplasm ;)

- Check the chloroplasts: Elodea is leaf, onion is root ;)
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Post by honeev » Thu Nov 16, 2006 9:00 am

isnt it onion a bulb (modified leaves) ? sorry if ive misunderstood this one again.. onion root tips are typically mounted to show stages of mitosis.. the onion skin is also a typical specimen to show prominent nucleus, vacuole and cell wall...
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Post by sachin » Thu Nov 16, 2006 5:25 pm

honee_v wrote:isnt it onion a bulb (modified leaves)


:P Agreed at the point.
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Post by MrMistery » Thu Nov 16, 2006 6:01 pm

yeap, the part of the onion we comercially eat is made up of modified leaves. however, what the doc said still goes, as these cells do not contain cloroplasts, they contain other kinds of plastids, specialised for storage..
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Post by nanoscaled » Fri Nov 17, 2006 2:30 am

yeah thx for the answer, but specifically, what factor makes the leaf different than the onion?

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Post by Dr.Stein » Fri Nov 17, 2006 4:39 am

Oops sorry, I think I made a mistake, because I did analyze onion's root recently :oops: Yes, for basic microscopical examination we use onion leaf a.k.a. the bulb. Sorry :oops:
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Post by Dr.Stein » Fri Nov 17, 2006 4:43 am

nanoscaled wrote:yeah thx for the answer, but specifically, what factor makes the leaf different than the onion?

Because the function of Elodea's leaf is different from onion's leaf, thus their structure must be different. Onion doesn't need chloroplasts for photosynthesis. Also, Elodea develops specific cells that is effective for photosynthesis.
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