Meselson and Stahl proved that

A. DNA contains nitrogen.
B. DNA replicates in a semi-conservative manner.
C. DNA is made from nucleotides.
D. DNA is the genetic material.


Answer: B

Biology & Microbiology

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What are the primary aspects of the process used by a tall tree to move water to the leaves at the top of the tree?

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Large organ in the RUQ: secretes bile, stores sugar, produces blood proteins___________________

Fill in the blank(s) with the appropriate word(s).

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Which layer of the skin is responsible for tanning?

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