What happens to your pulse when you run

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

if you look up in the top right corner you'll see your current profile picture, click than click "view profile" you'll be able to change it there.