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Partial table of contents: BOTANY. Seed Parts: Exterior and Interior. Nutrient Differences in Soils. Hydroponics: Growth Without Soil. Effect of Water on Turgor Pressure. Apical Dominance: Growth Inhibitor. Direction of Growth of Roots, Stems, and Leaves. Phototropism: Plant Movement Due to Light. Chromatography: Solar Photography. ZOOLOGY. Responses of Annelidas: Segmented Worms. Food Preservatives. Interactions in an Open Ecosystem. THE HUMAN BODY. Effectiveness of Sunscreens. Cellular Respiration. Effect of Stimuli on Reaction Times. Appendices. Glossary. Index.