An animal without a backbone is known as an invertebrate. A vertebrate is n animal that has a spine. And I am pretty sure polyp and hermaphrodite have really nothing to do with the backbone. Hope this helped!
<span>The victim's hair had grown 8 mm, which at a rate of 0.44 mm per day means that she was alive 18.18 days after dying her hair. Given the date of hair dying as August 1, 2004, it is likely that the victim was deceased sometime on August 19th, 2004. Time of the day depends on the previous hair dye schedule, which was not provided.</span>