We take coffee in the morning and at times lot of people report about acid reflux? You have learnt a little bit about pH. Is it something to do with pH? Use your knowledge of pH in your discussions.

answer; ///i believe its: ///(embolus);

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