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kungpow
 2 years ago
Best ResponseYou've already chosen the best response.0A lot bigger. http://www.life.umd.edu/classroom/bsci424/BSCI223WebSiteFiles/ProkaryoticvsEukaryotic.htm

Calliope
 2 years ago
Best ResponseYou've already chosen the best response.1In general, Eukaryotic cells are a fair bit larger than Prokaryotic cells (if you look at them under the microscope, you can generally see details inside Eukaryotic cells, whereas Prokaryotes are just tiny dots) but... HOW much bigger varies a lot, and, since this is biology we're talking about, there are exceptions: The largest bacteria (Thiomargarita namibiensis: http://en.wikipedia.org/wiki/Thiomargarita_namibiensis) range in size from 100200µm, with some specimens reaching 750µm. Flagellates (Eukaryotic singlecelled organisms characterised by one or more flagella) are typically only 520 µm, and Microsporidia (parasitic singlecelled Eukaryotes) are often only 14µm. Most bacteria, however, are only 0.55µm in length, which makes them smaller than almost all Eukaryotic cells. Wikipedia claims that they're "about one tenth the size of eukaryotic cells", but I would dispute that. Some Eukaryotic cells can be huge! There are whole organisms visible to the naked eye that are actually one multinucleated Eukaryotic cell. Look at this one: http://farm4.staticflickr.com/3093/2529754883_2cfdb9fed8.jpg (each little green umbrellashaped thing is a single Eukaryotic cell) Plasmodial slime molds can also reach enormous sizes. I've seen a photo of people measuring one that had been grown so it was several meters long.

blacklotus
 2 years ago
Best ResponseYou've already chosen the best response.0Eukaryotic cells are ten times bigger then prokaryotic cells http://etap.org/demo/biology1/instruction3tutor.html

Calliope
 2 years ago
Best ResponseYou've already chosen the best response.1... except for the ones that are millions of times bigger, @blacklotus, and the ones that are actually SMALLER. I have no idea where they got that "ten times bigger" value... they say it's an average, but even so. An average of what? All Eukaryotic cells? Metazoan cells? Metazoan + plant cells? I would think that if you'd include Fungi in that, you'd end up with a much larger number.

blacklotus
 2 years ago
Best ResponseYou've already chosen the best response.0@Calliope the cell size of eukaryotes are 10100um prokayotes size 110um i believe this is where they got the relationship of being ten times larger

Calliope
 2 years ago
Best ResponseYou've already chosen the best response.1Some Eukaryotic cells are MUCH bigger than 100µm. Acetabularia sp. immediately comes to mind. Not sure how big it is... maybe 510cm. Some Prokaryotic cells are also much bigger than 10µm. Thiomargarita namibiensis can reach 750µm. I'm wondering where they got the values that you cited, because it's really easy to find both Prokaryotic and Eukaryotic cells outside those size ranges.

blacklotus
 2 years ago
Best ResponseYou've already chosen the best response.0http://www.mrswiltrout.com/Ch72ViewOfTheCell.pdf im just comparing the smallest cell size of both eukaryotes and prokaryotes

Calliope
 2 years ago
Best ResponseYou've already chosen the best response.1The smallest Eukaryotes can be pretty tiny. Most are not as small as the average bacterium, sure, but Microsporidia can be 14µm. That's definitely within the "typical" Prokaryotic range that you gave above.
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