Science Enhanced S&S Biology - Virginia Department of ...

At the sampling locations: 5. Take a test tube half-filled with deionized sterile water, a stopper, and a cotton swab to one of the locations selected. 6. Dip the cotton swab into the water in the test tube. 7. Roll the wet cotton swab over the sampling location surface. 8. Put the cotton swab into the test tube. 9. ................
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