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In this activity, "write" a secret message in genetic code as beads on a string.

$1 - $5 per student Ages 11 - 18 30 to 45 minutes
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In this activity on page 1 of the PDF, learners compare the relative sizes of biological objects (like DNA and bacteria) that can't be seen by the naked eye.

free Ages 8 - 18 10 to 30 minutes