The temperature and the saline (saltiness) level of the water determines the density<span />
The pericardial cavity separates the parietal and visceral pericardium
Vestigial structures are parts of an animal's body that serve no function, but did in earlier evolutionary stages. Two examples of this are the human appendix and the snake pelvic bone.
C, Infertile couples could have children that contained some of their genetic make-up would be a specific benefit of human cloning.