Chapter 28: Protists Flashcards Preview

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Flashcards in Chapter 28: Protists Deck (18)
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1

Protists

  • Very diverse (unusual)
  • Common characteristics
    • Eukaryotic cell
      • Unicellular and multicellular, colonial
      • Autotroph and heterotrophs
      • Sexual and asexual reproduction

2

No longer a kingdom

Informally 3 groups:

  • Animal Like
  • Plant Like
  • Fungi Like

3

Protozoa

  • Are animal like protists
  • Heterotrophs
  • All unicellular
  • Can be classified based on movement
    • Flagella
    • Pseudopods
    • Cilia

4

Protozoa w/ flagella

  • Include a group called zooflagellates
    • Have one or more flagella
    • Well known symbionts and pathogens

5

Protozoa w/ Pseudopodia

  • Move and feed by pseudopodia
  • Notable groups
    • Amoebas
    • Foraminifera

6

Amoebas (Protozoa w/ pseudopods)

  • Ingestion through phagocytosis

 

  • Found in fresh and salt water, soil

 

  • Most are microscopic

7

Foraminifera (Protozoa with Pseudopods) 

  • Often called forams

 

  • Have shells

 

  • Found in marine environments

8

Protozoa w/ Cilia

  • Move and feed by cilia

 

  • Known as the ciliates

 

  • Most found in freshwater

9

​Algae

  • Are plant like protists
  • Are photosynthetic
  • Form base of aquatic food chains
  • Often grouped by chlorophyll type

10

Euglenoids 

  • Include animal/plant like members
  • Also have a flagella
  • Pellicle- allow shape change
  • Use chlorophyll a and chlorophyll b

11

Dinoflagellates

  • Found in aquatic, marine environments
  • Have 2 flagella
  • Some are bioluminescent
  • Others can produce toxins, cause red tide

12

Diatoms

 

  • Many species are phytoplankton
  • Have glasslike shells, made of silica
  • Produce half the oxygen we breath

13

Green Algae

 

  • Multicellular
  • Precursor to plants
  • Common features
    • Chlorophyll a, b
    • Carotenoids
    • Cell Wall: Cellulose

14

Brown Algae

  • Multicellular

 

  • Group includes giant kelp

 

  • Contain chlorophyll c

15

Red Algae

 

  • Multicellular
  • Contain the pigment phycoerythrin
  • Can be found in deep depths

16

​SLIME MOLDS

  • Are fungus and animal like
  • Important ecosystem decomposers
  • Produce fruiting bodies, aid in dispersal
  • Two Groups:
    • Plasmodial
    • Cellular

17

Plasmodial

  • Often brightly colored, yellow/orange
  • Generally lives as a single “super” cell, many nuclei
  • Forms mass of cytoplasm called plasmodium
  • Common under logs and dead leaves

18

Cellular Slime Molds

  • Commonly found in soils
  • Exist as a single amoeba like cells
  • Under stress, they can swarm
    • Form slug like mass of individual cells
    • Aggregate mass form a fruiting body