Help please, Scientists join cancer cells with antibody-producing white blood
cells to produce .

Scientists join cancer cells with antibody-producing white blood cells to produce monoclonal antibodies.

Explanation:

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

straight or amphibians are homeothermic to thermal