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Rhizopoda!. Rhizopods (often referred to as Amoeba). All unicellular Some of them have shells All use pseudopodia to move and feed Found in fresh water, marine environments, and soil A few are parasites (spread through drinking water, food, or eating utensils)

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rhizopods often referred to as amoeba
Rhizopods (often referred to as Amoeba)
  • All unicellular
  • Some of them have shells
  • All use pseudopodia to move and feed
  • Found in fresh water, marine environments, and soil
  • A few are parasites (spread through drinking water, food, or eating utensils)
  • Most are hererotrophs that eat bacteria, other protists, and detritus (dead organic matter)
what is pseudopodia
What is Pseudopodia?
  • A cellular extension
  • Amoebas use pseudopodia to move and feed
  • They extend a pseudopod, as seen in the picture, and anchor it’s tip
  • Then more cytoplasm streams into the pseudopod and allows them to move closer to the food
video ofamoeba and pseudopodia
Video ofAmoeba and Pseudopodia
  • http://www.youtube.com/watch?v=GadZ_MjSWN0
  • All of the long strands are Pseudopodia and are helping the Amoeba move closer to its food
actinopods heliozoans
Actinopods (Heliozoans)
  • Heliozoans- “sun animals”, they live in fresh water
  • Their skeleton are made of glassy or chitinous unfused plates
  • They also move and feed by using pseudopodia
actinopods radiolarians
Actinopods (Radiolarians)
  • Radiolarian refers to several groups of marine actinopods
  • Their skeletons are made of silica and fused into one piece (very delicate)
  • After actinopods die their skeletons sink to the sea floor and build up as a layer of ooze that is meters thick in some areas
review questions
Review Questions
  • What actinopods live in fresh water?
  • Heliozoans
  • What kind of skeleton do Radiolarians have?
  • made of silica and fused into one piece (very delicate)
  • What are two characteristics of Rhizopoda?
  • all unicellular, some have shells, all use pseudopodia, etc.
review questions continued
Review Questions Continued
  • Where are Amoebas found?
  • fresh water, marine environments, and soil
  • How are Amoeba parasites spread?
  • drinking water, food, or eating utensils
  • What type of skeleton do Heliozoans have?
  • glassy or chitinous unfused plates