Text of Slide 1: Euglena acus. Slide 2: Diatoms Slide 3: Paramecium caudatum
Slide 1
Slide 1: Euglena acus
Slide 2
Slide 2: Diatoms
Slide 3
Slide 3: Paramecium caudatum
Slide 4
Slide 4: Stentor coeruleus
Slide 5
Slide 5: Ameoba proteus
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Slide 6: Radiolarians
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Slide 7: Foraminifera
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Questions: 1. Why are ground-up diatoms sometimes used in
powdered cleansers? 2. Which protist that you observed do you think
is the most advanced? 3. Why is it more advanced? 4. In which
protist that you observed could you identify the most organelles?
5. How many organelles could you see and identify?
Plant-like Protists: Algae Live in water Autotrophs Make almost
one-half of the worlds carbohydrates and oxygen
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Slime molds Heterotrophic organisms that decompose organics to
obtain energy. Move like amoeba during much of life cycle Reproduce
with spores (like fungi)
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How do they move? Amoebas - pseudopod (false foot) Flagellates
- ? Ciliates - ?
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How do they reproduce? 1. Asexually: dividing into 2 identical
cells 2. Sexually: Conjugation- offspring get characteristics from
both parents
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Sensing and Responding Eyespot- senses changes in light, can
move to food, away from harmful chemicals
Animal-Like Protists: Protozoans Protozoan Ex 1: Amoebas
Heterotrophs Use PSEUDOPODS, aka false feet, to move & trap
food
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Animal-Like Protists: Protozoans Protozoan Ex 2: Giardia
Intestinal parasite from contaminated water Symptoms: tired,
weight-loss, diarrhea Use FLAGELLA to moveFLAGELLA
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Animal-Like Protists: Protozoans Protozoan Ex 3: Trypanosomes
Causes African Sleeping Sickness: Fatal! Fever, chills, skin rash,
affects nervous system In blood, spread by Tsetse flies in Africa
Use FLAGELLA to move
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Animal-Like Protists: Protozoans Protozoan Ex 4: Paramecium Use
CILIA to move and to bring food into their mouth poreCILIA Food is
packaged into vacuoles and chemically broken down Waste leaves
through anal pore
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Animal-Like Protists: Protozoans Protozoan Ex 5: Sporozoans
Produce spores to reproduce Parasites live in blood Plasmodium
causes malaria, Plasmodium Deadly - kills 3 million every year
Mosquitoes transfer infected blood
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Protists: Protozoans- plasmodium
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Plant-like Protists: Algae Algae Ex 1: EuglenaEuglena Have
chloroplasts- make food from light Flagellum to move Eyespot to
locate food Heterotroph and Autotroph!
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Plant-like Protists: Algae Algae Ex 2: DiatomsDiatoms Hard
shell made of silica (glass) Die, shells build up on the ocean
bottom collected and used for soaps and scouring powders
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Plant-like Protists: Algae Algae Ex 2: Diatoms
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Plant-Like Protists: Algae Ex 3: Dinoflagellates
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Dinoflagellate Structure 2 unequal flagella Cell wall with
plates of cellulose
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Dinoflagellates- Red Tide
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Dinoflagellates cause Red Tide Massive blooms Produce toxins
Kills fish Stored in mussels and clam tissue Causes Paralytic
Shellfish Poisoning (PSP)
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PSP (Paralytic Shellfish Poisoning) Toxin Neurotoxin 1000X
power of cyanide No antidote, need immediate medical attention,
life support equipment Low dose? w/ treatment, symptoms gone in 9
hours
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PSP Symptoms Numbness, tingling around mouth Vomiting, diarrhea
Double vision Respiratory paralysis, death
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Dinoflagellates Bioluminescence
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Protists: Algae Ex 4: Seaweed Have chloroplasts Many cells
together, up to 60 cm long and some 100 m tall (giant kelp) Red,
green, browngreen In many foods
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Protists: Osmosis- water balance Water moves through cell
membrane from high concentration of water to low concentration of
water In fresh water, a protist cell may burst, so protists collect
water and push it back out
Slide 39
Protists: Osmosis in Cells
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Osmosis- water balance
Slide 41
Contractile Vacuole Contractile Vacuole in Paramecium Full
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