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Across 4. pesticides stress 7. N base in DNA 9. moving by energy into or out of a cell 11. feed off of others 13. microscopic plant 17. building blocks of protien 18. made up of atoms 20. how something works

Down 1. group of species 2. where you live 3. same 5. true nucleus 6. fruit sugar 8. simplest sugar 10. vinegar flies 11. steady state 12. study of enviroment and organism 14. found on DNA 15. calvins cycle in photoynthesis stroma 16. break down of food 19. protien starts/stops reaction 21. genetic infomation