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Ch 20-PROTISTA. 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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slide2

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

slide3

Classification based on :

  • 1)________________________________-heterotrophs,autotrophs,decomposers and parasites
  • 2)Some classified by how they move

nutrition

ii animallike protists
II. Animallikeprotists:___________________________________

protozoans

  • 4 Phylla: distinquished by modes of movement
  • ___________________use whiplikeflagella;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

Zooflagellates

Foraminiferans

pseudopods

slide7

cilia

Paramecium

  • Ciliophora move by hairlike __________________;best known are of genus ____________-has micronucleus and macronucleus,gullet or oral groove,analgroove,contractile vacuole to balance water content,reproduce asexually and sexually by conjugation
  • _____________do not move;manyparasites,reproduce by ________

spores

sporozoans

slide9

Diseases from protists

  • ****-_____________________-caused by Plasmodium and Anopheles mosquito,many forms resistant to drugs

malaria

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***Other Protistandiseases_Trypanosoma

Carried by ______fly

tsetse

slide13

NONPARASITIC__Trichonympha-mutualism

Digests wood for termite!!!!

iii plantlike protists
III.PlantlikeProtists
  • -Unicellular algae
  • Contain 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

diatoms

Crysophyta

slide17

PHYTOPLANKTON-near surface of ocean and food source

  • Algal blooms that are massive depletion of nutrients and many cells die-an indicator of pollution
iv plantlike protists red brown and green algae
IV .Plantlike protists-red,brown and green algae
  • Red algae-__________________-uses chloroplyll a and accessory pigments and can live at great depths;mostmulticellular 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

Phaeophyta

Rhodophyta

slide20

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

Chlorophyta

human uses of algae
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
V.Funguslikeprotists
  • 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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