1. Show a color photo of the earth, as taken from space, to discuss the biosphere and the carbon cycle.

2. Show Figure 9.2, the carbon cycle.

1. Show Figure 9.5, central pathways of metabolism, which illustrates food molecules (polymers) being digested into their monomers.

1. Show Figure 9.6, glycolysis, where glucose is split into smaller molecules and ATP is formed.

1. Show a slide of mitochondria, preferably an EM.

2. Show Figure 9.7, which illustrates the relationship between structure and function in mitochondria.

1. Show Figure 9.8, the Krebs cycle, as a summary of the chemical reactions involved in cellular respiration.

1. Show Figure 9.9 and discuss how the electron transport system operates like a bucket brigade where each electron carrier is alternately reduced and oxidized.

1. Show Figure 9.11 to illustrate that a proton gradient across a membrane can be used to synthesize ATP.

1. Show Figure 9.14 and discuss the biochemistry of fermentation.

2. Show Figure 9.15, commercial fermentation vats, and discuss how industry puts bacteria and fungi to use productively.

3. Bring demonstration materials like beer, wine, bread, or Swiss cheese, to illustrate that carbon dioxide is a product of fermentation and is responsible for the carbonation in the beverages and the holes in the cheese and the bread.

1. Show a person eating a piece of cake, or eat a piece of cake in front of the class, and discuss how excess sugar can be processed to fatty acid and stored on a limited basis.

1. Show Figure 9.17 to illustrate that some organisms respire in a way that is chemically different from that of most animals.

2. Show a picture of a colorful marine aquarium, and discuss the use of Nitrosomonas and Nitrobacter bacteria in the substrate and their use in converting ammonia to nitrite and nitrite to nitrate as a means of detoxifying the water.

1. Figure 9.19 summarizes the pathways involved in heterotrophic metabolism.