ch20notesprotista2010

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BIOLOGY__Chapter 20-PROTISTA notes

I.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 • Classification based on : • 1)________________________________-heterotrophs,autotrophs,decomposers and parasites • 2)Some classified by how they move

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

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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 ________--Diseases from protists

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****-_____________________-caused by Plasmodium and Anopheles mosquito,many forms

resistant to drugs • • Other Protistan diseases_Trypanosoma Carried by ______fly • • Amebic dysentery

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Giardia

• •

NONPARASITIC__Trichonympha-mutualism

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Digests wood for termite!!!!

III.Plantlike Protists

Unicellular algae

Contain chlorophyll and undergo photosynthesis

***_____________________-plantlike,have flagella and no cell wall

• •

_________________________________-yellow-green algae and golden brown algae

_______________________-thin ,delicate CELL WALLS OF SLICA-GLASSLIKE

DINOFLAGELLATES-half are photosynthetic and half are heterotrophic,some luminescent

PHYTOPLANKTON-near surface of ocean and food source

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Algal blooms that are massive depletion of nutrients and many cells die-an indicator of pollution

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

Green algae-_______________________-have chlorophyll a and b;unicellular,colonial,and multicellular

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 V.Funguslike protists

Have centrioles and LACK 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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