Dear Shirley:

As to the question in your first post: “‘Why do you think humans share about 1000 genes with prokaryotic cells?” I would answer simply: because humans have common ancestry with prokaryotic organisms. The teacher reviewing the answer of course, requires more details and you provided those.

As to your second post, I was always more interested in the biological sciences than I was with the physical sciences. I am satisfied being aware that gravity exists. But I know throughout your thread that you are interested in the physical sciences and that is wonderful. Of course black holes have been a fascination to people beyond the science of it, hence the black holes/ space science fiction books and movies so common.

anita