A heat engine gives greater efficiency when run with a large temperature difference. In the oceans the temperature difference between surface and deep water is greatest in the tropics, although still a modest 20 to 25 Â°C.
A blastocyst is a cellular mass that forms early in the process of embryo development in mammals. In humans, this stage of embryogenesis occurs five days after fertilization, when there are fewer than 100 cells in the mass.
It is the same with an in-vitro blastocyst. The egg or seed has been fertilized but it has not been implanted into the fertile soil of a woman's womb. It has the potential of becoming a human being, but a blastocyst is not a human being. A human being is an organism, a blastocyst is not.My book, Right to Recover, Winning the Political and Religious Wars over Stem Cell Research in America will cover in detail this and many other topics concerning stem cell research.t may be a blog, but if it is, I found no place to leave a comment or interact with others, so I'm bringing the conversation here to my blog. Gregory's article shows that he is somewhat open-minded, but still believes that a blastocyst and a human being are the same thing.