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Protists (Chapter 29)
Outline of Protists
69
Biology
Undergraduate 2
09/26/2012

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Term
Endosymbiosis
Definition
"Living together in close association"
How Mitochondrion and Chloroplast were incorporated into Eukaryotic cell.
Term
Secondary Endosymbiosis
Definition
When an entire bacteria is taken into a larger cell
Term
Cysts
Definition
dormant protists with resistant outer coverings
Term
phototrophs
Definition
photosynthetic protists
Term
Phagotrophs
Definition
ingest food particles by pulling them into intercellular vesicles
Term
Phagosomes
Definition
food vacuoles used by phagotrophs
Term
Osmotrophs
Definition
protists that ingest food in soluble form
Term
Asexual reproduction
Definition
an individual inherits all of its chromosomes from a single parent, thus being genetically identical to that parent.
Term
Bud
Definition
asexually produced outgrowth that develops into a new individual.
Term
Schizogony
Definition
when cell division is preceded by nuclear divisions that allow cytokinesis to produce several individuals.
Term
Diplomonad
Definition
  • Have 2 nuclei
  • Lacks mitochondria
  • Unicellular
  • Move with Flagella
  • Example: Giardia

 

Term
Parabasalid
Definition
  • Lack Mitochondria
  • Have undulating membanes
  • use flagella
  • Example: Trichomonas vaginalis
Term
Euglenoid
Definition
  • Among earliest eukaryotes to possess mitochondria
  • 1/3 have chloroplasts
  • Can become heterotrophic in the dark
  • Can change shape because of flexible pellicle
  • Example: Euglena

 

Term

Euglena

 

Definition
  • Two flagella attached to reservoir
  • Contain chloroplasts with chlorophylls a and b with carotenoids
Term
Reservoir
Definition
Found in Euglena, collects excess water from contractile vacuoles. This hleps regulate osmotic pressure.
Term
Kinetoplastids
Definition

Single mitochondrion in each cell with two tpes of DNA (minicircles and maxicircles)

 

Term
Trypanosomes
Definition
  • Kinetoplastids
  • Cause human diseases
  • Example: African Sleeping Sickness, Chagas disease
Term
Alveolata
Definition
Have flattened vesicles stacked in a continuous layer that function in membrane transport
Term
Dinoflagellates
Definition
  • Photosynthetic
  • unicellular
  • two flagella
  • live in both marine and freshwater environments
  • Spinning motion
  • Overgrowth causes red tide
Term
Apicomplexans
Definition
  • Form spores
  • Parasites of animals
  • Example: Plasmodium
Term
Plasmodium
Definition
Malaria-causing Apicomplexan parasite
Term
Apical complex
Definition
Fibrils, microtubules, vacuoles, and other organelles at one end of an Apicomplexan cell
Term
Gregarines
Definition
Apicomplexans that attach to intestinal epithelium of arthropods, annelids, and mollusks.
Term
Toxoplasma
Definition

Affects people with low immune system by attacking human intestinal cells (why pregnant women shouldn't change litter boxes)

 

Term
Ciliates
Definition
  • Two nucei
  • Form vacuoles for ingesting food and regulating water balance
  • Example: Paramecium
Term
Stramenophila
Definition

fine hairs found on flagella

 

Term
Brown Algae
Definition
  • Alters generations between sporophyte and gametophyte
  • Seaweed
Term
Diatoms
Definition
  • Double shells
  • Chloroplasts include a and c
  • Produce carbohydrate chrysolaminarin
  • Move by use of raphs
Term
Oomycetes
Definition
  • Either parasites or saprobes
  • "Water Mold"
  • Unequal flagella
  • Example: Phytophthora infestans (caused Irish potato famine)
Term
Rodophyta
Definition
  • "Red Algae"
  • lacks flagella and centrioles
  • reproduce using alternation of generation
  • Used commercially to thicken ice cream and cosmetics
Term
Chanoflagellates
Definition
  • single flagellum
  • feed on bacteria strained out of water by contractile "collar"
  • Closely related to sponges
Term
Amoebas
Definition
  • Rhizopoda
  • Actinopoda
Term
Rhizopoda
Definition
Move and eat with pseudopods
Term
Actinopoda
Definition

secrete exoskeletons made of silica

 

Term
Foraminifera
Definition
marine protists with shells reinforced with calcium carbonate or sand
Term
multinucleated Plasmodium
Definition
  • Slime mold
  • non-walled
  • multinucleate mass of cytoplasm
  • forms sporangium if food or moisture is in short supply 
Term
Cellular slime mold
Definition
  • behave as indivual amoebas but act together when food becomes scarse
  • send out cAMP to find moisture
Term
Parabasalids and diplomonads
Definition
hererotrophic flage3llates
Term
Trichonympha
Definition
symbiont that digests cellulose in termites and cockroaches
Term
Trichomonas vaginalis
Definition
parabasalid that causes STD
Term
Girardia
Definition
Diplomonad found in water that causes hiker's sickness
Term
Diplomonad
Definition
2 nuclei, 3 anterior flagella, 1 posterior flagella
Term
pellicle
Definition
flexible, translucent covering
Term
Kinetoplastids
Definition
parasites that have conspicuous mDNA. There are 800 species
Term
Trypanosoma
Definition
kinetoplastid genus that includes sleeping sickness and Chaga's disease
Term
Chaga's disease
Definition
found in South America, unilateral swelling of eyelid and face
Term
Alveolates
Definition
Ciliates, Dinoflagellates, Apicomplexans
Term
Alveoli
Definition
membrane-bound sacs found beneath plasma membrane
Term
Paramecium
Definition
Typical ciliate, flattened alveoli that store Calcium ions.
Term
dinoflagellates
Definition
Flagellated alveolates. Have 2 flagella
Term
Alveoli of dinoflagellates
Definition
contai ncellulose
Term
Red tide
Definition
caused by dinoflagellates
Term
Apicomplexan alveolates
Definition
parasitic alveolates, pierces host cell. Example: Plasmodium (malaria)
Term
Pellicle of Apicoplexans
Definition
flattened
Term
Stramenopiles
Definition
have flagella with bristles
Term
Examples of stramenopiles
Definition
Golden Algae
Coccolithopores
diatoms
brown algae
oomycotes
Term
Brown Algae
Definition
make fucoxanthin, Example: Giant kelp
Term
Diatoms
Definition
photosynthetic stramenophiles with silica shells, quarried for insulating materials, abrasives, and filters
Term
Oomycotes
Definition
major decomposers, colorless stramenopiles, Example: Caused Irish Potato famine
Term
Red Algae
Definition
multicellular and marine
Term
Porphyra
Definition
example of red algae
Term
Green Algae
Definition
photoautotrophs that are closest relatives of plants
Term
Choanoflagellates
Definition
ancestors of sponges, single flagellum with contractile collar
Term
Amoebas
Definition
heterotrophs that move on cytoplasmic extensions
Term
pseudopodia
Definition
cytoplasmic extensions used for movement
Term
Amoeba types
Definition
true amoebas, radiolarians and foraminiferans, slime molds (plasmodial and cellular)
Term
Foraminiferans and radiolarians
Definition
single-celled amoebas that probe food with hundreds of pseudopods
Term
Plasmodial slime molds
Definition
myxomycetes, have conspicuous plasmodial stage
Term
Cellular slime mold
Definition
Come from spores, can move to areas of higher nutrient concentration and light
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