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Rhizopoda!

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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Rhizopoda!

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  1. Rhizopoda!

  2. 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)

  3. 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

  4. 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

  5. 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

  6. 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

  7. 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.

  8. 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

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