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46 Cards in this Set
- Front
- Back
Freshwater protists |
Amoeba, euglena, paramecium |
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Amoeba |
Single-celled protist. |
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Define protists |
Paraphyletic. Simple organisms, which cannot be put into other kingdoms. Eukaryotes |
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Do protists need water |
Yes. Found in moist habitats including water, soil, decaying organics or in plants and animals. |
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Marine protists |
Forums and radiolarians |
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Protists that live inside other organisms |
Babesoa, trichonympha |
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Can protists move? |
Yes using pseudopodia, flagella or cilia |
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Difference between eukaryotes and prokaryote |
Eukaryotes have nucleoid and circular DNA. Prokaryote have nucleus, organelles and linear dna. Both have cells, cell membranes and ribosomes |
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Define heterotrophic |
Eats other organisms |
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Define autotrophic |
Produces own food |
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What protist is both hetero and autotrophic |
Euglena |
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Define phagotroph |
A heterotrophic protist that eats by pulling food into phagosomes, or food vacuoles. Lysosomes fuse with food vacuoles, introducing enzymes that digest it. Digested molecules absorbed across membrane and into organism. |
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Phagosomes |
Food vacuoles |
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define pseudopodia |
False feet . Protist movement. |
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How to amoeba move |
Pseudopodia. Hyaline cap allows endoplasm to flow through and push pseudopodium forward |
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Define hyaline cap |
Clear space at edge of pseudopodium when forming. Endoplasm flows through here to push pseudopodium forward. |
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Fc |
G |
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What does a contractile vacuole do |
It expels excess liquids after intake, ie in amoebas |
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How do amoebas respire |
Oxygen in water is diffused across amoeba membrane and converted into CO2 |
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How do amoebas respire |
Oxygen in water is diffused across amoeba membrane and converted into CO2 |
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How to euglena eat- are they autotrophic? |
Photosynthesis. Both hetero and auto. |
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Can euglena move? |
Yes, with flagella. Moves with light |
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What was used to slow euglena movement on the slide |
Methyl cellulose |
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Define pellicle |
Tough, flexible covering around protists such as euglena |
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Define flagella |
Long, whip-like strand |
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Define reservoir in a euglena |
Depression at base of flagellum |
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Define stigma in euglena |
Light-sensitive structure |
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Eat are the animal characteristics of euglena |
Flagella |
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Paramecium |
Freshwater, protists, covered with cilia. |
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Define cilia |
Short, hair-shaped organelles in a protein coat called pellicle |
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Function of pellicle |
Helps transmit force of beating fro over by along whole surface of euglena |
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Macronucleus |
One of the nuclei in paramecium, operates cell activities |
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Micronucleus |
One of the nuclei in paramecium, used for reproduction |
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How do paramecium feed |
Intake of microorganisms and some water via oral groove |
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Movements of paramecium |
Move inwards and outwards |
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Forams |
Amoeboid marine protozoa that secrete calcareous, chambered test. Can be benthic or planktonic |
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Do forams move |
Yes, with pseudopodia |
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Radiolaria |
Marine. Siliceous tests, often spiny. Pelagic. Marine oozes when dead. |
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Commensalism |
Both members benefit but both can be independent |
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Mutualism |
Both members benefit and can't live independently |
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Parasitism |
One member benefits at expense of the other |
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Trichonympha |
Found in intestines of termites. Symbionts with termites |
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Describe symbiosis between termites and trichonympha |
Termites eat wood, mainly cellulose, but can't digest. Trichonympha use phagocytosis to ingest cellulose. They break down the cellulose and feed the leftover Carbon to the termite. |
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Do trichonympha move? |
Yes, with flagella. |
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Reproduction of trichonympha |
Sexual and asexual |
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Babesia |
Cause anaemia in host. A tick bites a dog and releases into dogs bloodstream. |