Chloroplast help please =/

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ineedhelpbad
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Chloroplast help please =/

Post by ineedhelpbad » Fri Nov 18, 2005 4:10 am

How is the nature and place of the chloroplast a result of their enviroment?

i got so far that the place is: they are close to the outside of the cell, within the membrane because these organelles require sunlight to perform photosynethiese, the "harvest" of sunlight into carbohydrates.

now how about the nater of the chloroplast? any suggestions?

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Jokkon
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Post by Jokkon » Fri Nov 18, 2005 4:49 am

what about surface area?
great surface area
double membrane
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mith
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Post by mith » Fri Nov 18, 2005 1:03 pm

not sure about the surface area but if you look at a dissection of a dicot leaf, you'll see that the chloroplasts are all arranged in a unique fashion in the palisade layer, instead of being horizonatal, they're all packed quite tightly and arranged vertically.
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Post by Terry K. » Fri Nov 18, 2005 3:22 pm

Yes, the dicot leaf does have a very organized chloroplast system. If you look up a picture of the leaf magnified on the internet you will better understand when I say the chloroplast system resembles that of an ice crystal if magnified at a molecular level. Now the surface area is huge in chloroplast system. Think of it this way, if the chloroplasts are always close to the outer membrane so they can collect vast amounts of sunlight(which is ironic because all photosynthetic organisms on Earth only collect 1-2% of the sun's energy), than the more surface area you have, the more energy can be collected. Broad skinny leaves are probably the most efficient of all the leaves, with the exception of possibly pine needles, which basicly are an outer membrane with chloroplasts. So think of it this way, broad skinny leaves or coniferous pine needles are the most efficient energy collecters because of the amount of sun they can collect due to the increased surface area to volume ratio as pertaining to the surface area. Hope I helped you out!
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Post by MrMistery » Fri Nov 18, 2005 7:37 pm

What do you mean by the nature of the chloroplast?
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ineedhelpbad
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Post by ineedhelpbad » Sat Nov 19, 2005 8:18 pm

i unno thats just the question and i dont know how to finish it

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Post by MrMistery » Sun Nov 20, 2005 3:39 pm

Nature as in structure? Then you can indeed say about the tylacoid membranes that allow maximum amount of light to be taken in by the chloroplast
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Post by DJ » Sun Nov 20, 2005 7:23 pm

Or is it nature like origin? You could quote the endosymbiotic theory.

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