Chapter 4 Crossword

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Across
  1. 5. An autotrophic organism that serves as a source of food for other organisms in a food chain.
  2. 10. two parents are needed.
  3. 13. Having or consisting of one cell; one-celled: unicellular organisms.
  4. 16. other feeders; heterotrophic nutrition.
  5. 19. utilization of food by living things for growth and energy
  6. 21. The biochemical emission of light by living organisms
Down
  1. 1. organism that are unable to make their own food
  2. 2. The classification of organisms in an ordered system that indicates natural relationships
  3. 3. is a rapid increase or accumulation in the population
  4. 4. A single-celled or multicellular organism whose cells contain a distinct membrane-bound nucleus.
  5. 6. The collection of small or microscopic organisms, including algae and protozoans
  6. 7. A photosynthetic bacterium of the class Coccogoneae or Hormogoneae
  7. 8. production of offspring by one parent.
  8. 9. A single-celled organism with two flagella
  9. 11. Any of various microscopic one-celled or colonial algae
  10. 12. organism that are unable to make their own food
  11. 14. organisms that lack a nuclear membrane.
  12. 15. A discoloration of seawater caused by a bloom of toxic red dinoflagellates
  13. 17. self feeder
  14. 18. Singled-celled and multi celled; have nuclei; absorb food from living and dead organisms
  15. 20. various chiefly aquatic, eukaryotic, photosynthetic organisms