Biology  5/e   Raven/Johnson
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Pass around the vial of primordial soup that you cooked up in the lab the day before. Add a spark from your always-handy lightening generator and voila — life in the classroom! (Probably the first sign of it if your lecture is at 8:00 in the morning.)

Bring in a variety of objects and discuss why they are or are not classically defined as being alive. Include something that can be divided into smaller imitations of itself (simulating reproduction), something mechanical (simulating metabolism), something dead (but still made up of cells), and some kind of computer storage device (simulating heredity).

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