Hi Volunteer,
We try to control the topics in a thread here so things aren't any more chaotic than they already are.
I think you question is too far from the focus of the thread to be discussed here.
You may propose a new topic in the Proposed New Topics thread if you like. However, maybe you should do a bit of reading and research on your own first.
These kind of questions can sometimes be difficult to answer but yours are particularly easy. We have extant organisms around today who circulate "blood" without a brain for example.
The rest of your questions are based on a deep, deep lack of understanding of the evolutionary model and are best answered in another thread.
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