1. PowerLecture: Chapter 22 Chart Supplement
“Protists” – The Simplest Eukaryotes

2. Protists
Fig , p.314

3. Protists
Fig. 22-2, p.352

4. Giardia (a Diplomonad) A Waterborne parasite
Fig. 22-3b, p.353

5. Giardia imprints on intestine
Fig. 22-3c, p.353

6. Trypanosomes (Kinetoplastids)
undulating membrane
mitochondrion
basal body
of flagellum
free flagellum
nucleus
Trypanosoma brucei causes African sleeping sickness
T. cruzi causes Chagas disease

7. Trypanosomes (Kinetoplastids)
undulating membrane attached to flagellum
red blood cell
Fig. 22-5b, p.355

12. Live foraminiferan Radiolarians
Fig. 22-6, p.355

13. Body Plan of Paramecium
food vacuole
food residues being ejected
gullet
cilia
trichocysts (“harpoons”)
contractile vacuole emptied
contractile vacuole filled
micronucleus
macronucleus
Fig. 22-7a, p. 356

14. Dinoflagellates
Here’s one
that causes
“red tide”

15. Plasmodium Life Cycle Anopheles mosquitoes sporozoite sporozoites
merozoite
male gametocyte in red blood cell
Fig , p.359

16. Toxoplasma (an Apicomplexan)
Cysts ingested with undercooked meat
Exposure to cysts from cat feces
Symptoms usually mild
Infection during pregnancy can kill or damage the embryo

17. Ciliate Conjugation
have macronucleus & micronucleus

18. a Prospective partners meet.
Fig. 22-8a, p.357

19. b Partners physically join up, most often at their oral depression.
Fig. 22-8b, p.357

20. c The two cells undergo cytoplasmic fusion
c The two cells undergo cytoplasmic fusion. The micronucleus of each enters meiosis I.
Fig. 22-8c, p.357

21. d Meiosis II follows and results in four haploid micronuclei
d Meiosis II follows and results in four haploid micronuclei. The macronucleus of each cell starts to degenerate.
Fig. 22-8d, p.357

22. e In each cell, one haploid micronucleus stays intact; the other three degenerate.
Fig. 22-8e, p.357

23. f Each haploid micronucleus divides
f Each haploid micronucleus divides. Each cell will swap a daughter micronucleus with its partner.
Fig. 22-8f, p.357

24. g Two micronuclei in each cell fuse, forming a diploid micronucleus
g Two micronuclei in each cell fuse, forming a diploid micronucleus. Each cell now contains genetic material from the other.
Fig. 22-8g, p.357

25. h The conjugating cells disengage. The micronucleus of each divides.
Fig. 22-8h, p.357

26. i Micronuclei in each cell divide
i Micronuclei in each cell divide. Then the original macronucleus degenerates.
Fig. 22-8i, p.357

27. j Each cell now has four micronuclei.
Fig. 22-8j, p.357

28. k Of the four micronuclei, two develop into macronuclei.
Fig. 22-8k, p.357

29. l Cytoplasmic division now begins, and two cells form.
Fig. 22-8l, p.357

30. m Each daughter cell contains one micronucleus and one macronucleus.
Fig. 22-8m, p.357

31. Brown Algae (Phaeophyta)
bladder
blade
stipe
holdfast
Fig c, p.361

32. Porphyra (Red Algae) Life Cycle
sporophyte (2n)
zygote a b
Diploid Stage
fertilization
meiosis
Haploid Stage
germinating spore (n) d
male gametes
female gametes c
gametophyte (n)
Fig , p.363

37. Life cycle of Dictyostelium discodeum
Spores
Cellular Slime Mold
Mitotic
Cell Division
Mature Fruiting
Body
Aggregation
Acrasiomycota
Amoeboid cells aggregate to form migrating mass, fruiting body
Culmination
Life cycle of Dictyostelium discodeum
either or
Migrating Slug Stage
Fig , p. 381

38. Fig c, p.367

39. Fig d, p.367

40. \
Fig e, p.367

41. Fig f, p.367