Compared to its closest nonvertebrate ancestors, the body tissues of most vertebrates are unique in that they...
A. are able to secrete hormones that regulate various bodily functions.
B. consist of multiple types of cells.
C. have nerve cells that can communicate via electrical impulses.
D. can incorporate minerals to create unique tissues (e.g. mineralized cartilage) and surfaces (e.g. enamel).
E. can develop an iodine-rich gland that lines the pharynx (i.e. the endostyle).
