Explain the endosymbiotic theory of the origin of eukaryotic cells and discuss two examples of evidence supporting this theory.

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 maintain homeostasis when a persons internal body temperature is 97.5°f

Which of the following cell structures is significantly different between gram- positive and gram-negative bacteria?