1. biology   Biologie   Infinitesmalrechnung   Philosophie   Physik   Hint Half-n-half Clue   2. trigonometry   Infinitesmalrechnung   Zoologie   Biologie   Trigonometrie   Half-n-half Clue   3. botany   Botanik   Erdkunde   Infinitesmalrechnung   Geschichte   Half-n-half Clue   4. calculus   Psychologie   Biologie   Algebra   Infinitesmalrechnung   Half-n-half Clue   5. zoology   Zoologie   Psychologie   Geschichte   Botanik   Half-n-half Clue   6. psychology   Chemie   Biologie   Psychologie   Botanik   Half-n-half Clue   7. geology   Botanik   Chemie   Geologie   Geometrie   Half-n-half Clue