I can clear the following topics of student in biology fruitfully 1. Cell the unit of life 2. Tissue (plant and animal tissue ) 3. The living world 4. Biological classification 5. Kingdom plantae 6. Kingdom animalia 7. Kingdom Monera, Protista and Fungi 8. Morphology of flowering plants 9. Anatomy of flowering plants 10. Biomolecules ( DNA , RNA, Protein etc.) 11. Structural organisation in animals 12. Cell cycle and cell division( Mitosis and Meiosis) 13. Transporation in plants 14. Photosynthesis in plants 15. Respiration in plants 16. Mineral and Nutrition 17. Plants growth and development , plants hormones 18. Digestion and absorption 19. Excretion 20. Breathing and exchange of gases 21. Locomotion and movement 22. Neural control and coordination 23. Human eyes , ear etc. 24. Hormones in human 24. Reproduction in plants and animals 25. Reproductive health 26. Genetics (Mendel's law linkage etc) 27. Microbes in human welfare 28. Biotechnology principle and procedures 29. Microbes in human warfare 30. Crop production and management 31. Ecology, Ecosystem etc. 32. Organism and population 33. Biodiversity and conservation 34. Environmental issue