Projects merely using mathematics to understand a different subject should be in that subject. Ideas MI Mentors Index 10. Pesticide Deposition and its Long-term Impact upon the Growth of Bacteria. Projects using bacteria as a tool to study another subject belong in that subject. For example, a study using bacteria to monitor the effectiveness of disinfectants belongs in Chemistry .
Studies measuring antibiotic activity belong in Pharmacology .
Ideas PA Mentors Index 11. Any studies of drugs, alcohol, or tobacco. Effect of any drug or chemical on plants, animals, bacteria, and humans. Studies may be at the cellular or organism level. Projects which study the effect of fertilizers on plant growth belong in Plant Biology Ideas PH Mentors Index 12.