Select all of the answers that apply. which of the following events define the proterozoic eon? 1.eukaryotic cells first seen 2.stable continents 3.first bacterial fossils 4.cambrian explosion 5.oxygen builds up in atmosphere

Ronald wants to see if a new shower cleaner works better in removing soap than his old cleaner. he uses the new cleaner on one half of the shower tiles and his old cleaner on the other half. identify the independent and dependent variables in this experiment. enter your answer in the space provided.

Freckles are a dominant trait in humans. both of the girls have the genotype ff for freckles. if either one marries a man with no freckles, what are the chances that their children will have freckles?

If animal agriculture was eliminated, how much grain would become available for human consumption?