So if i were to remove the human spine what would happen to said human

What must be true for natural selection to heppen

Classify the structures as homologous or analogous, depending on their structure and function.

How did the discovery of the rhesus factor affect society? o more patients died from having a transfusion with the wrong rhesus factor 0 new treatments during pregnancy could prevent harm to the developing child. o less donated blood could be used in the treatment of patients. the number of blood types was reduced by half