The nurse is caring for a 6-year-old girl who had surgery 12 hours ago. the child tells the nurse that she does not have pain, but a few minutes later she tells her parents that she does. which should the nurse consider when interpreting this?

the answer is d. chordata

the cladogram shown here shows similarities and differences among several classes of vertebrates. anatomically, the four have limb structure as their common ancestor. we might separate the mammals from the other three classes because they a) divergent; do not lay eggs b) identical; are warm-blooded c) varied; a four chambered heart d) homologous; have mammary glands