The information about groundwater recorded by a student is valid when

it is not biased

its results cannot be repeated

it is not obtained from a primary source

its findings do not have to be shared with others

How did the research presented in the article affect scientists' understanding of the evolution of eukaryotes

Which is required for sexual fissiondiploid cell productionmeiosis

Molecular models of two different substances are shown below. in the molecule on the left, the oxygen atom pulls on electrons more strongly than the hydrogen atoms. in the molecule on the right, the two oxygen atoms pull on the shared electrons with the same strength. water molecule, h, o oxygen molecule, oz when the two substances are put in the same container, they do not attract each other. why does this happen? a. they both contain oxygen. b. one is polar and one is nonpolar. c . they are both polar. d. they contain different elements.