Eukaryotes Have nucleus and membrane bound organelles Most are unicellular, some are multicellular...
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Transcript of Eukaryotes Have nucleus and membrane bound organelles Most are unicellular, some are multicellular...
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- Eukaryotes Have nucleus and membrane bound organelles Most are unicellular, some are multicellular or colonial Can be plant-like, fungus-like, or animal- like Kingdom is considered to be obsolete and will be split into newly designated kingdoms
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- EUGLENOPHYTA Uincellular, have chlorophyll a and chlorophyll b Have flagella tht protrude from a gullet and an eyespot that helps them respond to light (phototaxis) Live in fresh water that is rich with organic material May exist as autotroph or heterotroph
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- Unicellular organisms that live in marine and freshwater. Have photosynthetic pigments, two flagella and cell walls of cellulose. Some produce toxins associated with red tides.
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- Includes the golden algae Most are unicellular, some multicellular Have photosynthetic pigments, golden color Cells are covered with tiny scales of silica or calcium carbonate
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- Green Algae Have photosynthetic pigments Most have flagella at some phase of their lives. Store food as starch
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- Brown algae - Mostly multicellular Photosynthetic and have chlorophyll a,b,c plus carotinoids. Asexual zoospores and gametes have two flagella. Includes giant kelps
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- Red Algae Mostly multicellular marine seaweeds. Have chlorophyll a and b and red pigment called phycobillin Found at great depths Used in sushi
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- Diatoms Usually non-motile unicellular organisms Cell walls are in two parts and are made of silica (look like petri dish)
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- Non-photosynthetic Heterotrophs
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- Unicellular protozoa Move by flagella Some live in guts of termites Trichonympha Others are parasitic and cause disease, such as African sleeping sickness, Trypansoma
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- Amoeba Performs phagocytosis by surrounding and engulfing food using pseudopodia (false feet)
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- Unicellular protists Have calcareous shells with pores through which cytoplasm extends
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- Unicellular protozoans Move about and feed using tiny hairs called cilia. Best know is Paramecium, has two nuclei, and oral groove, and contractile vacuoles
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- Non-motile parasitic spore-formers Lack flagella Amoeboid body form Include Plasmodium, the malaria parasite In red blood cells
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- Slime molds produce large multinucleated masses (plasmodium different than malaria Plasmodium) Some have stalks that grow upward and form spores Other times produce gametes which fuse and produce a diploid zygote that forms the multinucleate mass Found in moist soil, decaying leaves or logs in a damp forest.