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single celled vs. multicellular organisms

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single celled vs. multicellular organisms

Postby chris4733 » Fri Oct 28, 2005 5:18 am

I hope I don't sound like an idiot asking this question, but I was wondering if someone could help me with pointing out differences between multicelled and single celled organisms. I have never been very good with biology and we had a discussion the other day in class about it and I couldn't quite grasp what everyone was talking about. I read through my book when I got home, but there wasn't to much information on it, just the differences between prokaryotes and eukaryotes which I understand. I logged on to the internet and tried to look up info also, but I had no luck. I guess my frustration would be that if I were asked to point out differences between them I wouldn't know what to say other than one has one cell and the other has more. I am sorry if this sounds ridiculous, but I would really appreciate some input or a suggestion to point me in the right direction. Thank-you.
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Postby rambo » Fri Oct 28, 2005 9:06 am

sorry i meant to say multicellular organisms cells contain dna which are passed down from elders
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Re: single celled vs. multicellular organisms

Postby zami'87. » Fri Oct 28, 2005 12:45 pm

The only thing in my mind at the moment is that in most multicelular organisms cells are so differentiated that they cannot survive alone.
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Postby mith » Fri Oct 28, 2005 2:27 pm

Do they need more or are they simply capable of having more due to the separation of nuclei?
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Postby MrMistery » Fri Oct 28, 2005 7:27 pm

That is the main difference. The cell of the single celled organism has to do everything, while the cells of the multicellular organism are super specialised to do one thing. That is why they are much more efficient. It is this that has allowed multicellular organisms to grow to such a size, along with other factors...
"As a biologist, I firmly believe that when you're dead, you're dead. Except for what you live behind in history. That's the only afterlife" - J. Craig Venter
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Postby pandman » Tue Jun 19, 2007 2:17 pm

is there more single cells or multi-cellular organisms in the world? :D :D :D :D :D :D :D :D :D :D :D
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Postby pandman » Tue Jun 19, 2007 2:19 pm

waiting!!




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Postby blcr11 » Tue Jun 19, 2007 2:54 pm

Prokayrotes (single-cell organisms)--by far the largest single contributor to Earth's biomass is bacteria. Then add in Archae and yeasts (not prokayotes, though) and it gets pretty overwhelming. We multi-cellulars are supremely outnumbered. As Gould once said, "The First Age was the age of bacteria--and we're still in it."

Gee, I hope you didn't strain your emoticon finger.
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Postby david23 » Tue Jun 19, 2007 10:00 pm

There are more single cell organisms in a cup of water from a dirty lake than the number of multicellular organisms on earth. That should be fun.
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