Molecules naturally spread from areas of concentration to areas concentration through a process called

a) high; low; diffusion
b)low; high; diffusion
c)high; low; active transport
d)low; high; passive transport

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

where in your body is there an enzyme that does function at a high or low ph? what is the name of that enzyme and its function?