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

Protists Fig. 19-19, p.314

Protists Fig. 22-2, p.352

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

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

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

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

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

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

Dinoflagellates Here’s one that causes “red tide”

Plasmodium Life Cycle Anopheles mosquitoes sporozoite sporozoites merozoite male gametocyte in red blood cell Fig. 22-11, p.359

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

Ciliate Conjugation have macronucleus & micronucleus

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

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

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

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

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

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

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

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

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

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

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

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

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

Brown Algae (Phaeophyta) bladder blade stipe holdfast Fig. 22-13c, p.361

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. 22-17, p.363

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. 22-23, p. 381

Fig. 22-23c, p.367

Fig. 22-23d, p.367

\ Fig. 22-23e, p.367

Fig. 22-23f, p.367