Answer: Rosalind Franklin discovered the density of DNA and, more importantly, established that the molecule existed in a helical conformation. Her work to make clearer X-ray patterns of DNA molecules laid the foundation for James Watson and Francis Crick's suggestion that DNA is a double-helix polymer in 1953.
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3 answer is Red blood cells are red because of hemoglobin in our body which makes our blood red
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I hope it helps you
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dependent is what ur measuring, independent is the diff salt concetration
and the control group is what stays the same like the water or the plant. not sure, it's not rlly clear
