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This Kingdom includes: Giant Sea Kelp ( multicelluar ) to microscopic euglena (unicellular)

KINGDOM PROTISTA. This Kingdom includes: Giant Sea Kelp ( multicelluar ) to microscopic euglena (unicellular) Organisms that do not seem to fit into the other kingdoms Organisms that are autotrophic, heterotrophic or sometimes both! Can reproduce sexually and asexually.

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This Kingdom includes: Giant Sea Kelp ( multicelluar ) to microscopic euglena (unicellular)

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  1. KINGDOM PROTISTA This Kingdom includes: Giant Sea Kelp (multicelluar) to microscopic euglena (unicellular) Organisms that do not seem to fit into the other kingdoms Organisms that are autotrophic, heterotrophic or sometimes both! Can reproduce sexually and asexually

  2. How Are They Useful? • Ex. Phytoplankton are the oceans largest producers – lungs of the earth! • Ex. Zooplankton feed on phytoplankton and are a large part of the aquatic ecosystem • Ex. Nori is the seaweed used to make sushi!

  3. Symbiotic Protists • Ex. Zooxanthallae • live in corals (animals that make up the coral reefs) • When stressed, they loose chlorophyll which causes coral bleaching and possible death.

  4. Protista Parasites • Many do not cause disease – just live off their host • Some are very dangerous - Maleria, sleeping sickness, amoebic dysentery

  5. Origins • Prokaryotic cells whose membrane folded in on itself giving rise to membrane bound organelles – nucleus, golgi apparatus, lysosomes, ect.

  6. Endosymbiosis • Process where one type of cell lives inside another cell • Thought that mitochondria and chloroplasts were once prokaryotic cells that were engulfed by a eukaryotic cell.

  7. How do such large particles get in and out of a cell?Endocytosis and Exocytosis

  8. Evidence Mitochondria and Chloroplasts: • Have 2 membranes • (inner like proks; outer like euks) • Have their own DNA • (more like proks) • Reproduce independently • via binary fission like proks

  9. Life Cycles • Unicellular - similar to bacteria • Asexual ~ binary fission • Sexual ~ conjugation • Multicellular – often more complex • Ex. Brown Algae ~ asexual and sexual process called Alternation of generations: • Diploid organisms asexually produce haploid spores, that develop into haploid organisms, that make haploid sex cells, that fertilize to become diploid zygotes, that develop into diploid organisms to complete the cycle.

  10. HWK: • Read 2.3 pg 60-66 • Questions #2, 6ab and 7 on pg 67 • Use the table on pg 63 to describe the 3 structures below that are used for protist locomotion.

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