Across
- 3. example of an abiotic factor
- 6. stage 2 of speciation
- 7. stage 1 of speciation
- 9. the process of which green plants make their own energy
- 10. the number of organisms of the same species in a habitat
- 13. made up of many food chains
- 14. scientists do this which allows crops to grow bigger and stronger
- 16. this uses nitrates and phosphates to grow out on control
- 17. this is need by crops to form amino acids
- 18. this is not a limiting factor
- 19. example of selective pressures
- 20. caused by errors in genetic material
Down
- 1. something in short supply that prevents photosynthesis from taking place at maximum rate
- 2. where an organism lives
- 4. living things
- 5. this type of farming usually involves one crop
- 8. the ultimate source of energy
- 10. carnivore that hunts prey species
- 11. role an organism plays
- 12. the organisms which occupy a habitat
- 15. energy lost from a food chain
- 19. usually a green plant which photosynthesises
- 21. show the direction of energy flow