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