He could race multiple cars with different weight added on them and do multiple races (just to be sure) and see if his theory was correct, if not he should right down what he has learned from his experience! :D
-You'll never learn if u don't try ;)
I believe the answer id Cnidaria
They have a cell membrane, they contain cytoplasm and can replicate themselves through the manner of mitosis.
I Believe the answer to your question is True.<span />
I would have to say pressure and heat