¿por qué la mayoría de los tipos celulares no emplean la señalización autocrina para estimular la proliferación celular?

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

not sure if this what   you'r looking for would be percent composition