What is one way in which the lymphatic system works together with the immune system?

What did not occur in the proterozoic eon a)the oxygen levels increase greatly in the atmosphere,b)the emergence of the eukarya , c)muti cella’s eukaryotic organisms began to diversify,d)anaerobic bacteria kept thriving with more oxygen

What are antigens and antibodies? how are they involved in the body’s response to incompatible blood?

How would you expect the mrna codons that code for the amino acids that make up hemoglobin to compare between humans