Bbbbbbbb

1234567891011121314151617181920
Across
  1. 2. eat only meat
  2. 4. eat only plants
  3. 8. network of feeding interactions
  4. 12. all life on earth
  5. 15. algae and certain bacteria and convert it into forms that living cells can use
  6. 16. group of diverse small swimming animals
  7. 17. the chemical substances that an organism needs to sustain life
  8. 19. process in which chemical energy is used to produce carbohydrates
  9. 20. plant and meat eater
Down
  1. 1. obtaining energy by converting nitrates into nitrogen gas
  2. 3. Non-living things
  3. 5. the scientific study of interactions among organisms
  4. 6. living things
  5. 7. animals that harness energy directly from the environment
  6. 9. digest decomposers
  7. 10. floating algae
  8. 11. organisms that rely on other organisms for energy and nutrients
  9. 13. bacteria and fungi
  10. 14. the total amount of living tissue within a given trophic level
  11. 18. each step in the food chain is called