
It's the Choice Chamber, two clear-plastic Petri-ish dishes connected by a small corridor. Made to use in experiments with isopods (woodlice or "pillbugs") involving choice between two environmental options such as wet/dry, light/dark, leaves/sand. Dishes measure 3-1/2" OD x 3-1/8" ID x approx 3/4" deep with removable lids and a 1/2" x 7/16" ID chamber between them. Includes classroom instructions.
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94309 CHOICE CHAMBER |
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