Mistletoe extracts water and nutrients from the spruce to the spruce tree's detriment. What relationship is shown here between the mistletoe and the tree? A. Competition
B. Parasitism
C. Mutualism
D. Commensalism

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