Topic: Evolution
Quote: The resistant bacterium has not evolved \xe2\x80\x93 in fact it has digressed genetically and is defective. Such a mutant strain is rapidly replaced by \xe2\x80\x9csuperior\xe2\x80\x9d (i.e. natural) bacteria as soon as the antibiotic is removed. Another example would be the hairless Chihuahua dog. In extreme heat, reduction of size and loss of hair may be useful adaptation, but this involves degeneration. Sanford\nAnd this is more important than it may seem. The fact is, it\xe2\x80\x99s not just bacteria \xe2\x80\x93 but all of life is in a state of constant degeneration via mutations.
Response: Cite your source, preferably online, so that it can be found easily. Of course, this is like you asking for an example of tests done on animals (I assume that you mean vertebrates). Mutations can be harmful and often are, except when a selective pressure is exerted. In those cases, some mutations become helpful, and those reproduce. Please research your claims.\n
0.6