Food web and chains

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Across
  1. 3. An organism that makes its own food.
  2. 7. An organism that is eaten by the predator.
  3. 10. An organism that captures the prey and eats it.
  4. 11. An organism that makes its own food.
  5. 12. Bacteria that is commonly found in the lower intestine of warm-blooded organisms.
  6. 13. An organism that eats other plants or animals for energy and nutrients.
  7. 15. Association between organisms of two different species in which each benefits.
  8. 18. An association between two organisms in which one benefits and the other derives neither benefit nor harm.
  9. 19. The position of an organism in the food chain ranges from a value of 1 for primary producers to 5 for marine mammals and humans.
  10. 20. An animal that eats animals
Down
  1. 1. The process by which plants use sunlight, water, and carbon dioxide to create oxygen and energy in the form of sugar.
  2. 2. Organelle within the cells of plants and certain algae that is the site of photosynthesis.
  3. 4. An animal that eats plants and animals.
  4. 5. The representation of total living biomass or organic matter present at different trophic levels in an ecosystem.
  5. 6. An animal that eats plants
  6. 8. Treat infections caused by bacteria
  7. 9. A linear sequence of organisms through which nutrients and energy pass as one organism eats another.
  8. 14. Exchange of oxygen and carbon dioxide.
  9. 16. Consist of a number of food chains meshed together.
  10. 17. Organisms that are too small to be seen without using a microscope.