Cancer

August 14, 2008 at 3:53 pm #9964

Participant

A thought just occurred to me and I was hoping to get some other viewpoints.

If we look back to the distant past when living organisms were mostly single-celled, it seems that some percentage of them must have developed into something resembling a cancerous cell, just by chance mutations. Since these cells would be divide rapidly, it seems they would outstripe production of "normal" cells and would monopolize available resources.

Cancer is detrimental to a complex multicellular organism, but seems an advantage to single celled organisms. Just look at the HeLa cell lines.

So, why isn’t the planet crawling with "immortal" single celled organisms that reproduce at a fantastic rate instead of the multitude of complex organisms we see today? Why did group cooperation at the expense of the individual win out?

Thanks in advance for your comments.

August 14, 2008 at 5:39 pm #85512

mith

Participant

Yes, they’re called bacteria.

August 14, 2008 at 5:55 pm #85513

canalon

Participant

As mith say, because most of the organisms you see are living off what becteria are not using 🙂
But also because sometimes cooperation is more efficient than selfishness.

August 14, 2008 at 8:53 pm #85522

Darby

Participant

Cancer cells need a support system – advanced cancers have no function beyond feeding and dividing, which is easier to do in a multicelled system – and even then, it will eventually draw enough resources to kill the organism. Free single cells have more to do than just feed and reproduce.

August 15, 2008 at 3:13 am #85527

alextemplet

Participant

quote nickb79:

So, why isn’t the planet crawling with “immortal” single celled organisms that reproduce at a fantastic rate instead of the multitude of complex organisms we see today? Why did group cooperation at the expense of the individual win out?

The vast majority of organisms on the planet are microbes, so single-celled organisms are still the dominant life form.

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