Protistsstudent

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  • Protistsstudent

    1. 1. Chapter 21 Protists Section 1: Characteristics of Protists Section 2: Protist Diversity Section 3: Protists and Health
    2. 2. Section 1 Characteristics of Protists Objectives: <ul><li>List the characteristics of __________________. </li></ul><ul><li>List three ____________________________ where protists can be found. </li></ul><ul><li>Identify the unifying features of protists. </li></ul><ul><li>Distinguish ________________ and sexual reproduction of Chlamydomonas . </li></ul>
    3. 3. Section 1 Characteristics of Protists Diversity <ul><li>Characteristics The kingdom ______________________ contains the most diverse groups of eukaryotic organisms of any kingdom. Protists live in moist environments and can be either free-living or parasitic. </li></ul><ul><li>The First Eukaryotes Protists were the first eukaryotes to have _____________________ about 1.5 billion years ago. </li></ul><ul><li>What Unites Protists The kingdom Protista contains all eukaryotes that cannot be classified as animals, plants, or ______________________. </li></ul>
    4. 4. Section 1 Characteristics of Protists Reproduction <ul><li>Sexual _____________________________________ in Protists Some unicellular protists can reproduce sexually in times of stressful environmental conditions. </li></ul>
    5. 7. Section 2 Protist Diversity Objectives: <ul><li>Identify how amoebas and forams move. </li></ul><ul><li>Describe the structure of diatoms. </li></ul><ul><li>Contrast three kinds of algae. </li></ul><ul><li>Differentiate three different kinds of flagellates. </li></ul><ul><li>Summarize the general characteristics of a Paramecium. </li></ul>
    6. 8. Section 2 Protist Diversity Ameboid Movement <ul><li>Amoebas Amoebas move using _________________________ extensions called pseudopodia. </li></ul><ul><li>Foraminifera Forams have porous shells, called tests. Long, thin projections of cytoplasm extend through the pores in the tests to aid in swimming and catching prey. </li></ul>
    7. 9. Section 2 Protist Diversity Algae <ul><li>Characteristics Algae are strictly photosynthetic protists that can be multicellular or unicellular. Algae are classified based on the type of photosynthetic pigment they contain. </li></ul><ul><li>Green Algae Green algae are multicellular or unicellular and contain chlorophyll. </li></ul><ul><li>Red Algae Red algae are multicellular with red pigments and have a complex life cycle. </li></ul><ul><li>Brown Algae Brown algae are multicellular with brown pigments and contain the largest organisms on earth. </li></ul>
    8. 10. Section 2 Protist Diversity Diatoms <ul><li>Diatoms Diatoms are unicellular protists with glasslike double shells. </li></ul>
    9. 11. Section 2 Protist Diversity Flagellates <ul><li>Characteristics Flagellates move with the use of a flagella. </li></ul><ul><li>Dinoflagellates Dinoflagellates are associated with poisonous “red tides.” </li></ul><ul><li>Euglenoids Euglenas have chloroplasts and an eye spot. </li></ul>
    10. 15. Section 2 Protist Diversity Flagellates continued <ul><li>Kinetoplasts Some kinetoplasts live symbiotically in the guts of termites where they provide the enzymes that digest wood. </li></ul><ul><li>Ciliates Ciliates are the most complex and unusual of the protists that contain cilia for mobility and feeding. </li></ul>
    11. 16. Section 2 Protist Diversity Protistan Molds <ul><li>Characteristics Protistan molds resemble fungi, but they are considered protists. </li></ul><ul><li>Cellular Slime Molds Cellular slime molds normally live as individual cells and aggregate for sexual reproduction. </li></ul><ul><li>Plasmodial Slime Molds Plasmodial molds live as colonial organisms and form sexual reproductive structures that form and spread spores. </li></ul><ul><li>Other Molds Oomycetes are molds that live as saprophytes or parasites. </li></ul>
    12. 17. Section 2 Protist Diversity Sporozoans Characteristics All sporozoans are parasitic and have complex life cycles.
    13. 18. Section 3 Protists and Health Objectives: <ul><li>Identify two ways that protists affect human health. </li></ul><ul><li>Name three human diseases, other than malaria, caused by protists. </li></ul><ul><li>Summarize how malaria is transmitted. </li></ul><ul><li>Evaluate the methods used to control malaria. </li></ul>
    14. 19. Section 3 Protists and Health Protists and Humans <ul><li>Beneficial Protists Protists positively affect human health through their participation in food webs, through commensal relationships with humans and their food sources, and by recycling vital resources. </li></ul>
    15. 21. Section 3 Protists and Health Malaria <ul><li>Disease and Protists Protists negatively affect human health by causing diseases in humans and their food sources. Protists cause diseases such as dysentery, giardiasis, toxoplasmosis, and malaria. </li></ul><ul><li>Malaria Life Cycle Protist, Plasmodium, has a complex life cycle that involves a mosquito, human blood, and liver cells. </li></ul><ul><li>Treating and Preventing Malaria Drugs and mosquito control can be used to control malaria. </li></ul>

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