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A monochorionic-diamniotic split (days 4 to 8) means the twins share a placenta
Because they decide what is readable
Both got their due in the historical record
If you can sketch a nucleosome from memory
cytosine - guanine earrings | silver Dan A monochorionic-diamniotic split (days 4Cytosine guanine earrings sterling silver Cytosine on one ear, guanine on the other. The stronger of the two Watson Crick pairs, three hydrogen bonds rather than two. The base pair that holds the double helix together when AT rich regions have already separated. Worn the same way the bases sit across the helix, paired but on opposite sides. The Science Behind the C G Pair Cytosine and guanine pair through three hydrogen bonds in the Watson Crick