Biology Crossword Puzzle

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Across
  1. 3. an association between two organisms in which one benefits and the other derives neither benefit nor harm
  2. 5. a biological community of interacting organisms and their physical environment.
  3. 9. Must eat other organisms for energy
  4. 10. Succession no soil, destroyed or newly formed
  5. 11. Chains group of organisms linked in order of the food they eat, from producers to consumers, and from prey, predators, scavengers, and decomposers
  6. 13. Species hardy, the first to colonize, turn barren rock into soil
  7. 15. A heterotroph that eats other animals for energy
  8. 16. symbiosis that is beneficial to both organisms involved
  9. 17. the practice of living as a parasite in or on another organism
  10. 19. Level each of several hierarchical levels in an ecosystem, comprising organisms that share the same function in the food chain and the same nutritional relationship to the primary sources of energy
  11. 20. A heterotroph that eats both plants and other animals for energy
Down
  1. 1. Makes its food using energy from the sun (photosynthesis) or chemicals (chemosynthesis)
  2. 2. A heterotroph that eats plants for energy
  3. 4. organism of microscopic size, which may exist in its single-celled form or as a colony of cells
  4. 6. a substance made up of various types of particles that occupies physical space and has inertia
  5. 7. the state of being diverse; variety
  6. 8. the preying of one animal on others
  7. 12. an organism, especially a soil bacterium, fungus, or invertebrate, that decomposes organic material
  8. 14. the activity or condition of competing
  9. 18. Succession has soil, and ecosystem destroyed or disturbed