Reflecting on the Article What do you think is the central question left unanswered by many origin of life theories?

most community's take hundreds of years to become stable

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

wha is what i will use to get my free points