LAB: Protists Flashcards
1
Q
Protists
A
- Belong to Domain Eukarya
- Algae and Protozoa
2
Q
Algae
A
- Autotrophic organisms that photosynthesize
- Unicellular, multicellular, or colonial
- Important in aquatic and marine food chains
3
Q
Protozoa
A
- Heterotrophic single-celled eukaryotes
- Free-living or form symbiotic interactions
- Obtain nutrients through ingestion
4
Q
Euglena (algae)
A
- 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
Q
Green Algae, Spirogyra
A
- 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
Q
Red Algae
A
- mostly multicellular
- responsible for coral reefs
7
Q
Brown Algae (Sargassum)
also Fucus and Laminaria
A
- Multicellular (macroalgae)
- often called kelp
- important for marine life
- leaf-like blades
- stem-like stipes
- root-like holdfasts
- gas-filled floats
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8
Q
Paramecium
A
- 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
Q
Amoeba
A
- shapeless
- feed and use locomotion by pseudopodia
- ingest food by phagocytosis
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10
Q
Trypanosoma
A
- Use flagellum for locomotion
- Deadly pathogen
- Causes African Sleeping Sickness
- transmitted by tse tse flies (vectors)
- Undulating membrane
