What have we studied so far?What have we studied so far?

Bacteria Archaea Eukarya

Eubacteria

Archaebacteria Protista Fungi Plantae Animalia

Domains & Kingdoms

Kingdom ProtistaKingdom Protista......... Most are single ... Most are single

celled, and have a celled, and have a nucleus (eukaryotic). nucleus (eukaryotic). Many consumers, but Many consumers, but a few are producers.a few are producers.

Guiding QuestionGuiding Question

Health and SocialHealth and Social

Area of InteractionArea of Interaction

How is the world we live in How is the world we live in impacted by things that you impacted by things that you can’t see? can’t see?

Groups of ProtistsGroups of Protists Protists are Grouped by Protists are Grouped by

what they act like. They what they act like. They can be can be – Animal Like

– Plant Like

– Fungus Like

Animal-like Protists(protozoans) Animal-like Protists(protozoans) are classified by how they move:are classified by how they move:

ZooflagellatesZooflagellates-- move using a whip-move using a whip-like tail called alike tail called aflagellum.flagellum.

CiliatesCiliates- Move by little hairs - Move by little hairs called called cilia.cilia.

SarcodinesSarcodines-- Move by oozing Move by oozing and flowing false feet called and flowing false feet called pseudopodia.pseudopodia.

Amoeba –Amoeba –performing performing phagocytosisphagocytosis(engulfing food)(engulfing food)

SporozoansSporozoans- - do not move but do not move but instead are instead are parasitesparasites and and move via their host.move via their host.

Protozoan DiseasesProtozoan DiseasesMalariaMalaria

– Caused by sporozoan. Severe flu-like symptoms to coma and death,

– carried by the mosquito

African sleeping sicknessAfrican sleeping sickness– Caused by flagellate. Carried by

tsetse fly. Headaches, seizures, death if untreated.

Amoebic dysenteryAmoebic dysentery– Caused by sarcodine. Fever,

stomach cramping. dehydration

Plantlike protists (Algae)Plantlike protists (Algae)

Unicellular algae and Unicellular algae and multicellular algaemulticellular algae

AutotrophsAutotrophs7 phyla or groups7 phyla or groups

EuglenophytaEuglenophytaTwo flagella, no cell wall,Two flagella, no cell wall, chloroplastschloroplastsEyespot for sensing lightEyespot for sensing lightEx: euglenaEx: euglena

Euglenophytes!

ChrysophytesChrysophytesGold colored chloroplastsGold colored chloroplastsStore food in form of oil, Store food in form of oil,

not starchnot starch

                                                                                          

ChrysophytesChrysophytes

BacillariophytaBacillariophytaDiatomsDiatoms

–Thin cell walls rich in silicon

BacillariophytesBacillariophytes

PyrrophytaPyrrophytaDinoflagellatesDinoflagellates

–Two flagella

–Bioluminescence (They glow!)

–Red Tide: seasonal bloom of Karenia brevis. Toxic to fish.

PyrrophytesPyrrophytes

                                                         

Multicellular plant-likeMulticellular plant-like

Classified by photosynthetic Classified by photosynthetic pigments (different pigments (different chlorophylls)chlorophylls)

Look like plantsLook like plantsProduce half of the world’s Produce half of the world’s

oxygen through oxygen through photosynthesisphotosynthesis

Red algaeRed algaeLive at great ocean depths Live at great ocean depths due due

to chlorophyll a and to chlorophyll a and phycobilins.phycobilins.

Help in the formation of Help in the formation of coral reefs coral reefs

Red algaeRed algae

Brown algaeBrown algaeChlorophyll Chlorophyll a and ca and c Common seaweed, kelpCommon seaweed, kelpStipe-stem, blades- leaf, Stipe-stem, blades- leaf,

bladders-floatationbladders-floatation

Brown algaeBrown algae

Giant Kelp Forests

Green algaeGreen algaeChlorophyllChlorophyll a and b a and bFresh and salt waterFresh and salt waterUnicellular, colonial, or Unicellular, colonial, or

multicellularmulticellular

Green algaeGreen algae

Human Uses of AlgaeHuman Uses of AlgaeFood: Food: sushi, ice cream, sushi, ice cream,

salad dressing, pudding, salad dressing, pudding, candy bars, syrup, egg nogcandy bars, syrup, egg nog

Medications, Medications, CosmeticsCosmeticsIndustrial uses: plastics, Industrial uses: plastics,

waxes, paints, lubricantswaxes, paints, lubricants

Algae & the Global EnvironmentAlgae & the Global EnvironmentPhytoplankton(algae) are the Phytoplankton(algae) are the

basis for most ocean food chainsbasis for most ocean food chainsAlgae produce ½ of the world’s Algae produce ½ of the world’s

oxygen.oxygen.

Deep ThoughtsDeep Thoughts

1.1. What would fish eat What would fish eat without protists?without protists?

2.2. How would the global How would the global environment change environment change without protists?without protists?

Fungus-like ProtistsFungus-like Protists Slime molds and water Slime molds and water

moldsmolds