Other posters have addressed the other questions so I'll focus on your comment concerning "massive IQs to come up with all this so fast". Evolution does not wo

Other posters have addressed the other questions so I'll focus on your comment concerning "massive IQs to come up with all this so fast". Evolution does not work that way. It is not a conscious decision or process on the part of the organism. It is the result of mutations due to imperfect copying of genetic material. Very likely most of the mutations are useless or harmful to the organism. But once in a while the mutation gives the organism an advantage and allows it and it's progeny to outcompete the other, unmutated organisms. Even the process of evolution does not make decisions or have a particular direction or goal. It's all randomness and depends on the large number of chances. As far as becoming more efficient at killing is, most viruses mutate to a state of being less deadly. Not killing the host is an advantage for a virus.