the answer is c. ecosystem i got a 100% on the test
I think it’s B sorry if it’s wrong
In other animals, such as the cartilaginous<span> fishes, which include the sharks, the </span>skeleton<span> is </span>composed<span> entirely of </span>cartilage<span>. The segmental pattern of the </span>skeleton<span> is present in all </span>vertebrates<span> (mammals, birds, fish, reptiles and amphibians) with basic units being repeated.</span>
