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Kingdom Protista

Kingdom Protista. Chapter 19. Kingdom Protista is extremely diverse Multicellular, unicellular, microscopic, large, autotrophic and heterotrophic Animal-like protists are called protozoans Heterotrophic and unicellular Plant-like protists are called algae Photosynthetic autotrophs.

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Kingdom Protista

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  1. Kingdom Protista Chapter 19

  2. Kingdom Protista is extremely diverse • Multicellular, unicellular, microscopic, large, autotrophic and heterotrophic • Animal-like protists are called protozoans • Heterotrophic and unicellular • Plant-like protists are called algae • Photosynthetic autotrophs

  3. Protozoan Diversity • Phylum Rhizopoda • Amoebas and amoeba-like organisms • Use pseudopods (extensions of cytoplasm) to eat and move • Live in fresh and salt-water • Most use asexual reproduction • Phylum Zoomastigina • Flagellates  move using flagella • Some are parasites that cause disease

  4. Phylum Ciliophora • Ciliates  move using cilia • Paramecium • Live in every aquatic habitat • Reproduce sexually and asexually • Phylum Sporozoa • Sporozoans produce spores • All disease causing parasites • Malaria

  5. Algal Diversity • Phylum Euglenophyta • Unicellular, aquatic; have both animal and plant-like characteristics • Move using flagella • Phylum Bacillariophyta • Diatoms • Have shells made of silica • Reproduce both sexually and asexually • Their shells are used in toothpaste, metal polishers and abrasives

  6. Phylum Dinoflagellata • Dinoflagellates have two flagella • Mostly marine • Phylum Rhodophyta • Red algae • Multicellular marine seaweed • No roots; use structures called holdfasts to hold to rocks • Phylum Phaetophyta • Brown algae  kelp

  7. Phylum Chlorophyta • Green algae • Unicellular, multicellular, or colonial • Asexual reproduction  fragmentation • Use alternation of generations

  8. Alternation of generations • Life cycle found in plants using both diploid and haploid organisms • Gametophyte haploid (n), produces gametes (sex cells) • Sporophyte diploid (2n), formed from the fusion of two haploid gametes • Produce spores through meiosis that are haploid and develop into a gametophyte

  9. Fungus-like protists • Slime molds  colorful, live in cool moist areas • Phylum Myxomycota • Plasmodial slime molds • Form plasmodium  a mass of cytoplasm with diploid nuclei but no cell wall or membranes • Break down organic matter • Phylum Acrasiomycota • Cellular slime molds • Live as independent amoeba-like cells until food becomes scarce • Haploid during entire life cycle • Phylum Oomycota • Water molds and downy mildews • Feed on dead organisms or are parasites

  10. Slime Mold Downy Mildew Water Mold

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