Flashcards in LAB: Protists Deck (10)
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1
Protists
- Belong to Domain Eukarya
- Algae and Protozoa
2
Algae
- Autotrophic organisms that photosynthesize
- Unicellular, multicellular, or colonial
- Important in aquatic and marine food chains
3
Protozoa
- Heterotrophic single-celled eukaryotes
- Free-living or form symbiotic interactions
- Obtain nutrients through ingestion
4
Euglena (algae)
- Are single-celled and have a long whip-like flagellum
- Have star-shaped contractile vacuoles to ride the cell of excess water
- Possess an eyespot to detect light intensity
- if light is not available, chloroplasts cease to function and collects food through its gullet
- Food is then digested by food vacuoles
5
Green Algae, Spirogyra
- Green algae are thought to be the evolutionary precursors to plants
-
Spirogyra: a filamentous green algae with cylindrical veg. cells that contain spiral shaped chloroplasts
- Sexual reproduction by conjugation
-
Conjugation tube is formed
-
Zygote is formed from the fusion of genetic material
6
Red Algae
- mostly multicellular
- responsible for coral reefs
7
Brown Algae (Sargassum)
also Fucus and Laminaria
- Multicellular (macroalgae)
- often called kelp
- important for marine life
- leaf-like blades
- stem-like stipes
- root-like holdfasts
- gas-filled floats
-
8
Paramecium
- covered with cilia used for locomotion
- uses oral groove to catch food
- food enters food vacuole and is digested
- leaves via anal pore
-
contractile vacuoles to remove water
- reproduces by mitosis or conjugation
-
Macronucleus (most cell process)
-
micronucleus (sexual)
9
Amoeba
- shapeless
- feed and use locomotion by pseudopodia
- ingest food by phagocytosis
-
10
Trypanosoma
- Use flagellum for locomotion
- Deadly pathogen
- Causes African Sleeping Sickness
- transmitted by tse tse flies (vectors)
-
Undulating membrane
