<span>I believe the answer would be B - the toy car would hit another toy car that would in turn hit another toy car, and so on. A wave has a ripple effect, so it will continue to happen down the line, until there is a force that stops it, or there are no more cars to hit.</span>
Early RNA molecules were able to self replicate, which helps to explain why all organisms share the same genetic code.
Pigs I believe because we take organs from them to perform transplants
Earth ? Or nature witch one are you getting at
