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Have germs been around ever since simple life began? If they have I'm suprised they never killed it off before it evolved further.
Many thanks Variola. The more I learn about biolgy the more unbelievable it all seems! :s
Others may correct me and/or amplify; but I think bacteria change very quickly. as an example; various bugs that cause infectious diseases have become immune to the antibiotics that we have created to combat them. every time each of us takes a course of anti-biotics (and especially if we don't finish the course) we are left with a tiny number of bugs that have survived; generation upon generation and infection after infection this leads to a species-wide immunity to the anti-biotic in question. in the last few decades, through inadvertant selective breeding, we have created bacterial strains with evolved immunity to multiple anti-biotics.i see no reason why they shouldn't be evolving in many other manners that are not so readily apparent. Matthew
Why haven't viruses taken over this planet? Some still we still have no defence against and I|'m surprised they are not the most dominant organism on Earth.
No wonder aliens stay clear!