I. An ant has hydrocarbons on its surface cuticle to repel water and prevent desiccation. The ant feeds largely on honeydew secreted by aphids, which feed on a plant stem. With the aid of Figure 1.1, trace the source of the ant hydrocarbons from carbon dioxide.

2. A bee expends energy in flying from flower to flower collecting nectar. What, according to Figure 1.1 is the ultimate source of that energy?

3. Classify the following substances as primary or secondary metabolites: vitamin A, alanine, camphor, deoxyribose, glucose, penicillin.

4. When a flower produces a perfume to attract pollinating bees, is that an allomone, kairomone or synomone?

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