Cold Feet: Warm-/Cold-Blooded Cracks a Yolk: Eggs Flexes Its Muscles: Body Mechanics For Lunch: Digestion Gets Eaten: Food Chain Gets Planted: Photosynthesis Goes Cellular: Cells Goes to Seed: Seeds Goes Upstream: Migration Hops Home: Habitat In a Pickle: Microbes Inside Ralphie: Germs Works Out: Circulation