ch 20-protista. the kingdom protista defined more by differences than similarities not actual...
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Ch 20-PROTISTA
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• The Kingdom Protista• Defined more by differences than similarities• Not actual plants ,animals or fungi• Many _________________________- and all
eukaryotes• So diverse that many biologists suggest they
should be composed of several kingdoms
UNICELLULAR
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• Classification based on :• 1)________________________________-
heterotrophs,autotrophs,decomposers and parasites
• 2)Some classified by how they move
nutrition
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II. Animallike protists:___________________________________
• 4 Phylla: distinquished by modes of movement• ___________________use whiplike flagella;many are
aquatic;many absorb food through cell membranes;many reproduce asexually and some sexually by meiosis
• Sarcodines use _________________for movement and feeding:example-amoebas-move by extensions of psuedopods:have food vacuoles;_______________secrete calcium carbonate shells
protozoans
Zooflagellates
pseudopodsForaminiferans
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• Ciliophora move by hairlike __________________;best known are of genus ____________-has micronucleus and macronucleus,gullet or oral groove,anal groove,contractile vacuole to balance water content,reproduce asexually and sexually by conjugation
• _____________do not move;many parasites,reproduce by ________
cilia ciliaophora
sporozoans
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• Diseases from protists• ****-_____________________-caused by Plasmodium and
Anopheles mosquito,many forms resistant to drugs
malaria
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***Other Protistan diseases_Trypanosoma
Carried by ______flytsetse
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****Amebic dysentery
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Giardia
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NONPARASITIC__Trichonympha-mutualism
Digests wood for termite!!!!
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III.Plantlike Protists
-Unicellular algaeContain chlorophyll and undergo photosynthesis***_____________________-plantlike,have 2 flagella and no cell wall
Euglenophytes
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• _________________________________-yellow-green algae and golden brown algae
• _______________________-thin ,delicate CELL WALLS OF SLICA-GLASSLIKE
• DINOFLAGELLATES-half are photosynthetic and half are heterotrophic,some luminescent
Crysophytadiatoms
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• PHYTOPLANKTON-near surface of ocean and food source
• Algal blooms that are massive deplete nutrients and many cells die-an indicator of pollution
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IV .Plantlike protists-red,brown and green algae
• Red algae-__________________-uses chloroplyll a and accessory pigments and can live at great depths;most multicellular and play role in coral reef
• Brown algae________________________-have chlorophyll a and c and an accessory pigment:largest and most complex of algae-kelp can grow 60 m in length
RhodophytaPhaeophyta
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• Green algae-_______________________-have chlorophyll a and b;unicellular,colonial,and multicellualr
Chlorophyta
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HUMAN USES OF ALGAE-
• -animal and human food source• -used in medications• -ice cream• -used in making
plastics,waxes,deodorants,paints,transitors ,lubricants,agar,toothpaste
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V.Funguslike protists
• Have centrioles and chitin cell walls of regular fungus kingdom
• Heterotrophs as decomposers• SLIME MOLDS-on forest floor-spore forming• WATER MOLDS-hyphae and spores-connected
to great “Potato Famine”
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Water mold
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