Protists

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Across

1. caused the potato blight
2. all are parasites of animals, & some cause serious diseases
5. organism hosts parasite
6. a dinoflagellate that causes fish kills
8. causes amebic dysentery
13. have modified mitochondria, use anaerobic pathways
15. named for their grass-green chloroplasts
17. are descended from green algae
19. amoeba that have lobe or tube shaped pseudopodia
20. organism that carries the parasite from one host to another
23. have one or two flagella that emerge from a pocket at end of cell
24. reduced mitochondria that generate some energy anaerobically
25. have a single mitochondrion with an mass of DNA, kinetoplast
27. symbiotic organisms formed by interaction between green algae & fungus
28. polysaccharides extracted from the cell walls of some red algae
29. most closely related to land plants
30. causes sleeping sickness
32. organism in which the parasite completes sexual reproduction
34. the symbiont harms but usually does not kill its host
35. can detect trichomonas
36. both the symbiont & host benefit from the relationship
37. microscopic aquatic photosynthetic organisms
38. many are parasites of vertebrates and some invertebrates
39. combine photosynthesis & heterotrophic nutrition

Down

1. pigment that gives red algae its colour
3. protists that absorb organic molecules
4. large varied group of protists, use cilia to move and feed
7. evade immune responses by switching surface proteins
9. the symbiont benefits while neither harming nor benefiting host
10. include some important human & animal parasites
11. protists that contain chloroplasts
12. contains a complex of organelles specialized for penetrating host cells
14. the largest and most complex algae
16. are a paraphyletic group
18. digest cellulose in the gut of termites
21. protists are also referred to as:
22. unicellular algae with two-part wall of silicon dioxide
26. nourish coral polyps that build reefs
31. appeared about 2 bya
33. causes malaria