Answer: Meselson & Stahl reasoned that these experiments showed that DNA replication was semi-conservative: the DNA strands separate and each makes a copy of itself, so that each daughter molecule comprises one "old" and one "new" strand. The semi-conservative model, in which each strand of DNA serves as a template to make a new, complementary strand, seemed most likely based on DNA's structure. ... From the patterns of DNA labeling they saw, Meselson and Stahl confirmed that DNA is replicated semi-conservatively.
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Image shows answer, obtained from google.
Agricultural society, if I understand the question correctly.
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everything can be found in the picture
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Red and yellow bell........... - genetic diversity
A park has....... - species diversity
Five different bird..... - species diversity.