What are the small structures in a cell's cytoplasm that the
cell to function?
o gametes
o chromosomes
o tissues
o organelles

What do heterotrophic cells need to survive?

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

Which process of living things produces water that enters the water cycle