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In the Meselson and Stahl experiment, E. coli cells were grown in heavy (15N) nitrogen, and then switched to light nitrogen. After two generations, there was 50% light and 50% half heavy DNA. What would the results have been if the conservative model had been correct? Below, put the expected […]

Briefly review how prokaryotes and eukaryotes provide different forms of biodiversity and why. What does each category tell you about evolution; pick one from an early era and one from today or recent times: Review two species of the seas Review two species on land and water Review two species […]

Oxidized (blue) DPIP becomes colorless when it is reduced – that is, when it receives electrons. A diagram of the photosynthetic light reaction shows that water molecules are the source of these electrons. How is it that the DPIP was only able to receive reducing electrons from the photosystems (and […]

1) Before scientific questions can be answered, they must first be converted to hypotheses, which can be tested. For each of the following questions, write an explanatory hypothesis. Recall that the hypothesis is a statement that explains the phenomenon you are interested in investigating. a) Does cell phone usage reduce auditory function? […]