kingdom protista - biology by napierkingdom protista this is some weird, wild stuff! evolution of...
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Kingdom ProtistaThis is some WEIRD, WILD stuff!
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Evolution of Eukaryotic Cell- Endosymbiotic Theory
Bacteria is living inside of another bacteria, overtime they became a eukaryotic cell
• Mitochondria and Chloroplasts have their own DNA
• DNA looks similar to prokaryotic DNA--plasmid
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Where is Protista?
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Due to new molecular and DNA evidence…Protista can be divided into 7 kingdoms:
• Parabasala• Alveolates• Cercozoa• Radiolarians• Amoebozoa• Euglenozoa• Diplomonadida
3 major types of protistsPlant- Like (algae), Animal- Like (protozoa), Fungi-Like
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Protista—Common Characteristics
• Eukaryotes
•Most are unicellular, few are Multicellular
•Heterotrophic or Autotrophic
• They don’t have cell differentiation (no tissues), or embryonic development (seeds, spores, embryo)
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Supergroup Excavata
Unicellular flagellates with a oral groove.
Euglena, Metamonda, Kinetoplastids—Feeding groove lets them phagocytize bacterial prey items
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Examples of Excavata• Euglena– use flagella to propel themselves, Autotrophic
Giardia lamblia-present in water, animal like, parasitic
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Red Algae (Rhodophyta)• Plant-Like
• Photosyntheic, Autotrophic
• No green pigments, no flagella
• Important for human use. Sushi anyone?
Porphyra
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Super Group Green Algae– Grandmother of Land Plants?• Occurs in ponds, lakes, oceans.
• Autotrophic
• Photosynthetic algae• Same photosynthetic pigments as land plants –Related to land plants?
• DNA evidence shows land plants descended from algae. Many want to include them in Kingdom Plantae.
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Ecology of Algae
• Algae is also responsible for the large amounts of oxygen in the atmosphere.
• Can also cause harmful algae blooms.
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Alveolata
• Ciliates, Apicomplexa, Dinoflagellates
• Ciliates move using cilia – short hair like projections
• Dinoflagellates move using flagella- long tail like structure
Paramecium
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Bioluminescence inNoctiluca scintillans
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Stramenopila
• Diatoms, Brown algae, Water molds (fungus like)
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• Brown algae
Sargassum
Histrio histrio-- sarb
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Plasmodium– causes malaria Toxoplasma gondiicauses toxoplasmosis
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Amoebozoa• Includes many amoebas which move using a pseudopodia.
Heterotrophic
food vacuole - a cavity which food is digested (broken down in order to be absorbed by the amoeba).
contractile vacuole - a cavity that excretes excess water and waste; the waste is brought to the cell membrane and is then eliminated from the amoeba.
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