Marine Protozoans (Phylum Protozoa)

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Across
  1. 3. a slimy lubricating and cleansing secretion
  2. 5. an ocean bottom sediment consisting of 30% or more foram skeletons
  3. 6. a type of radiolarian skeleton composed of silicon and possessing long needles which pass through the organism to the outside surface
  4. 7. bottom dwelling organisms
  5. 9. inhabiting the open water of the ocean, rather than the bottom of the shore
  6. 10. a foram that secrets several chambers
  7. 11. structures used by radiolarians to aid in controlling their depth in the water column
  8. 14. the process by which a species becomes better suited to survive in an environment
  9. 17. an organic matrix with embedded grains of sand
  10. 18. tiny hairlike projections; used for locomotion in some one-celled organisms
  11. 20. the inner portion of the radiolarian's cytoplasm that is nucleated
  12. 23. a hard outer covering
Down
  1. 1. the process of using food material produced by other organisms
  2. 2. small cavities that may contain secretions of the protoplasm or substances
  3. 4. the area from the water surface to the bottom
  4. 8. a foram that secrets a single chamber
  5. 11. the outer portion of the radiolarian's cytoplasm
  6. 12. a type of radiolarian skeleton which is delicate and lace-like
  7. 13. symbiotic one-celled algae found in coral, sea anemones, mollusks, and other types of marine organisms
  8. 15. very small particles of the decaying remains of dead plants and animals; an important source of food for many animals
  9. 16. a "false foot" formed by an extension of cytoplasm. it servers as a means of locomotion and a way of surrounding and thereby absorbing food
  10. 19. small plants and animals floating in the upper layers of the water column
  11. 21. the relationship in which 2 organisms live together in close association
  12. 22. a "container" within which a tintinnid is housed. It is either secreted by the organism or composed of foreign material cemented together