1.circle the letter of the protein that is not normal in people with sickle-cell disease
a. mucus b. hemoglobin c. red blood cells d. clotting protein

"do a testcross with a homozygous recessive plant."

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