1. Starter… Read 128 -133 Page 133 # 4, 7, 12 Page 154 # 10, 12, 13
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2. Kingdom Protista

3. Protists most diverse kingdom all eukaryotic
mostly unicellular aquatic organisms
asexual reproduction generally by binary fission
3 different groups
plant-like
animal-like
fungi-like
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4. 1. Plant-like Protists: Algae
all autotrophs
contain chlorophyll
have cell walls
2 major groups
a) unicellular algae b) multicellular algae
▪phytoplankton ▪ seaweed
diatoms
brown algae
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5. Plant-like Protists: Algae
a) unicellular algae
very important because:
begin every aquatic food chain
produce 67% of atmospheric O2
overpopulation causes algal blooms which can cause:
i) dead algae decomposed by saprophytes
consume large amounts of O2 – none left for fish
swamp produced
ii) produce toxins which kill fish
can also be harmful to humans
ex. red tide
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6. Plant-like Protists:Seaweed
b) multicellular algae (seaweed)
no real tissues i.e. colonies
food source for fish and humans
cell walls of red algae used to make:
agar
gel caps
cosmetics
Volvox
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7. 2.Fungus-like Protists (Slime Moulds)
multicellular body (like giant amoeba) called a plasmodium
roll over forest floor feeding on dead organic matter
move very slowly
(few mm/day)
reproduce asexually with spores (like fungi) in fruiting bodies
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8. 3. Animal-like Protists all heterotrophs classified by how they move
a) pseudopods:
move with cytoplasmic projections called pseudopods (false feet)
ex. amoeba
some pathogenic
i.e. amoebic dysentery
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9. Animal-like Protists c) ciliates
move with cilia (short hair-like projections) that can cover cell
ex. paramecium
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10. Animal-like Protists d) sporozoa reproduce by asexually by spores
have no means of locomotion
many parasites, which depend on host body fluids to move
ex. Malaria
RBC
anopheles mosquito
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11. Animal-like Protists b) flagellates move with long whip-like flagella
some parasitic pathogens
ex. African sleeping sickness
Giardia lamblia
(beaver fever)
trypanosome
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12. Paramecium Structure cilia contractile vacuole cytoplasm micronucleus
macronucleus
oral groove
gullet
food vacuole forming
anal pore
food vacuole
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13. Paramecium
spiral movement
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14. Paramecium Reproduction
same 2 organisms (genetically different )
2 new organisms (genetically identically )
Conjugation (sexual reproduction)
have two nuclei
exchange micronucleus with
another paramecium
Binary fission
(asexual reproduction)
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15. Amoeba Structure food vacuole contractile vacuole pseudopod endoplasm
ectoplasm
nucleus
Note: contractile vacuole
collects all the H2O that diffuses in by osmosis
contracts & pumps H2O out to stop amoeba from bursting
cytoplasm
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16. Amoeba Feeding phagocytosis pseudopod surrounds food
food enters a food vacuole
enzymes break down food in vacuole
pseudopod
food
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17. one amoeba divides into 2 identical amoebas
Amoeba Reproduction
Binary Fission (asexual)
one amoeba divides into 2 identical amoebas
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