Reply to Re: Just another thing to make you smile.
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The majority of mutations are maladaptive, not tumours. Also, an entire species does not undergo mutation together, but individually.. And the new genes won't perpetuate through the whole species unless they are beneficial
In regards to the Tasmania Devils. For those that do not know, tasmanian devils are currently being driven to extinction by a contagious cancerous disease (not genetic mutation). So it's not an example of what you seem to be implying. In fact it is somewhat the opposite, because as we see the tasmanian devils being driven to extinction we are also seeing the disease being driven to extinction. That is natural selection. Evolution selects for diseases that are not too effective in killing their hosts (probably why contagious cancers are extremely rare)
In regards to the Tasmania Devils. For those that do not know, tasmanian devils are currently being driven to extinction by a contagious cancerous disease (not genetic mutation). So it's not an example of what you seem to be implying. In fact it is somewhat the opposite, because as we see the tasmanian devils being driven to extinction we are also seeing the disease being driven to extinction. That is natural selection. Evolution selects for diseases that are not too effective in killing their hosts (probably why contagious cancers are extremely rare)
