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
• Classification based on :
• 1)________________________________heterotrophs,autotrophs,decomposers and
parasites
• 2)Some classified by how they move
nutrition
protozoans
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
Zooflagellates
pseudopods
Foraminiferans
cilia
ciliaophora
• 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 ________
sporozoans
• Diseases from protists
• ****-_____________________-caused by Plasmodium and
Anopheles mosquito,many forms resistant to drugs
malaria
***Other Protistan diseases_Trypanosoma
Carried by ______fly
tsetse
****Amebic dysentery
Giardia
NONPARASITIC__Trichonympha-mutualism
Digests wood for termite!!!!
III.Plantlike Protists
-Unicellular algae
Contain chlorophyll and
undergo photosynthesis
***_____________________plantlike,have 2 flagella and
no cell wall
Euglenophytes
• _________________________________-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
• PHYTOPLANKTON-near surface of ocean and
food source
• Algal blooms that are massive deplete
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
Phaeophyta
Rhodophyta
• Green algae-_______________________-have
chlorophyll a and b;unicellular,colonial,and
multicellualr
Chlorophyta
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 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”
Slime molds
Water mold