LAB: Protists Flashcards Preview

Biology 2 > LAB: Protists > Flashcards

Flashcards in LAB: Protists Deck (10)
Loading flashcards...
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