Explain why the idea of uniformitarianism is vital to the study of the Earth.

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

Describe the two types of vascular tissue

Wich of the following are manual restraint techniques for dogs