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In this biology activity, learners use plastic pipettes to cut wells into the solid gel layer of agar in petri dishes and place solutions of simulated antigen and antibody preparations into the wells.

This lesson is designed to serve as an introduction to the immune system. It can stand alone or it can lead into further studies of the immune system.

This three-part lab helps learners understand the essential principles governing diffusion and osmosis.

In this activity, learners use household materials to investigate and explore their ability to smell an odor.