what are animal-like protists?. animal-like protists called protozoas single-celled some parasites 4...
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What are Animal-like protists?
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Animal-LikeProtists
• Called Protozoas
• Single-celled
• Some parasites
• 4 Groups: amoebalike protists, flagellates, cilliates, & spore-forming protists
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AmeobalikeProtists
• Soft, jelly-like
• Found in fresh/salt water, soil, animals as parasites.
• contractile vacuoles
• Pseudopodia: false feet
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Feeding Amoebas
Engulf food
1. Senses food.
2. Surrounds bacteria or smaller protists with pseudopodia making a food vacuole.
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• Some parasitic amoebas live in human intestines and cause amebic dysentery (painful bleeding ulcers).
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Protozoa with Shells
Radiolarians• Have an outer shell
made of silica
Foraminiferans• Have snail-like shells
made of calcium carbonate
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Flagellates
• Have flagellums to move.• Live in water.• Some are parasites that cause dieases.
Ex. Giardia Lamblia (diarrhea)
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•Some have symbiotic relationships.Ex. Live in guts of termites to digest wood.
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Ciliates• Have 100’s of hair-like structures called
cilia.
• Cilia: move, help it get food, beat up to 60 x’s a second.
Ex: Paramecium
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Paramecium Have 2 Nucleus
Macronucleus Micronucleus
• Large nucleus
•Controls the functions of the cell.
• Smaller nucleus
•Passes genetic material during reproduction
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Protist Reproduction
Asexually• Offspring come from
just 1 parent using fission
Ex. Euglena and amoebas
Sexually• Offspring come from
2 parents.
Ex. Paramecium use conjugation to make 4 total organisms!
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Spore-Forming Protists
• Parasites• Have 2 hosts.
Ex. Plasmodium Vivax (Malaria)
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Malaria has 2 hosts!The mosquito and you!