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ACROSS
1)  an unforeseen obstacle
2)  a period marked by distinctive character or reckoned from a fixed point or event
3)  (biochemistry) a long linear polymer found in the nucleus of a cell and formed from nucleotides and shaped like a double helix; associated with the transmission of genetic information


DOWN
1)  ___ color or pigment; the chromatic color resembling the hue of blood
2)  a large vase that usually has a pedestal or feet
3)  the cry made by sheep

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