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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.

DNA is the thread of life. Encoded in its genetic sequence is the information that makes each of us unique. This activity allows you to see long, stringy strands of DNA extracted from wheat germ.

In this activity, learners place cards featuring biological structures in order by their relative size from largest to smallest.

DNA is the thread of life. Encoded in its genetic sequence is the information that makes each of us unique.

This activity is about collecting and analyzing DNA as part of a criminal investigation.