Protists Flashcards
(26 cards)
Euglenozoa includes
Trypanosoma
Euglena
Alveolata includes
Dinoflagellates
Paramecia
Plasmodium
Stramenopila includes
Diatoms
Phaeophyta (brown algae)
Saprolegnia (water molds)
Amoebozoa
Amoeba
Physarum
Dictyostelium
Rhodophyta
Red algae
Chlorophyta & Charophyta
Green algae
Spirogyra
Volvox
Chlamydomonas
Rhizarians
Foraminiferans
Radiolarians
Euglenozoa characteristics
Grouped off ultra structure (only seen by e microscope). . .
- flagella & mitochondria
Diet: primarily heterotrophic w/ some autotrophs and parasitic groups
Euglena
-Mixotrophic and flagellated
-green and leaf shaped
Trypanosoma
- kinetoplastid
-parasites both verts and inverts
-rear flagella that reaches front
Appearance: purple squiggles
What does SAR stand for and why are they grouped together?
Stramenopiles, Alveolates, and Rhizarians
- grouped based on DNA similarities
Diatom
-autotrophic
-most important photosynthesizers in cold marine water
-unicellular
-cell wall of silica
-mined in the form of diatomaceous earth for commercial uses (toothpaste, filters, etc)
-elongated (boat shaped)
-symmetrical and centric
Brown algae (phaeophyta)
- contains chlorophyll a and fucoxanthin
- edible: used as a thickener/emulsifier in things like ice cream
Saprolegnia (water mold)
-looks kind of like fungi
-cell walls of cellulose
-saprophytic nutrition (deriving nutrients from decaying matter)
-parasites
Alveolates
-single celled
-can be heterotrophic or autotrophic or parasitic
- common characteristic: aleveoli (sac like)
Paramecium caudatum
-heterotrophic
-cilia to move
-oral groove w/gullet
-food vacuole
-macro nucleus: multi copy of genome and controls majority of cell activity
-food for microscopic consumers
Dinoflagellates
-photosynthetic single celled organisms
-they produce light
-when they reproduce quickly (bloom) makes water look red
-cellulose cell walls
-two perpendicular grooves
-food for marine life
Plasmodium spp.
-organelle complex in apex of cell
-most are parasitic
-reproductive structures = spores
-causes malaria
-alternates between verts and inverts
-ring like structure
-feeds on bacteria
Rhizarians
Grouped from molecular evidence
Foraminiferans
Use pseudopodia ( cellular extensions for movement and feeding)
-make a hard test (outer covering) from calcium carbonate
-secrete in spiral pattern
- can grow to several centimeters
- food for larger orgs
-forms limestone deposits
Radiolarians
- secrete silicon dioxide
- axopodia extend in all directions from center
- silica deposits on ocean floor
-food for larger orgs
Amoeba
- lobe shaped
-naked (no shell)
-many habitats
-uses phagocytosis
-food por larger orgs
-some are parasitic
Red algae (rhodophyta)
-most are multicellular
- photosynthetic (chlorophyll a, phycocyanin, and phycoerythrin)
- can be green or blue
- agar can be extracted
- carrageenan can also be extracted to thicken food
- used for seaweed wrappers
-can be importantly to coral reefs and have calcium and magnesium in cell walls
- delicate and fine blades
Green algae (chlorophyta and charophyta)
-largest # of algal species
-freshwater and marine
- closely related to plants (store amylase and chloro a and b)
-primary producers
-nutrient dense ( chlorella genus has macros)
-farmed
