Protists Flashcards
Are protists prokaryotic or eukaryotic?
They are eukaryotic in domain Eukarya
Protists
- Eukaryotic
- Contain a nucleus and other membrane bound organelles
- Both multicellular and unicellular, but mostly unicellular
- Include hetreotrophs and heterotrophs
- Vary in function and structure more than any other other eukaryotic organism
Euglena
- Protist
- Unicellular
- Live in fresh water
- Move by flagella
- If deprived of light it will lose it’s chloroplasts and become a heterotroph
- The chlorophyll pigments are similar to algae and plants
Dinoflagellates
- Protist
- Unicellular
- Most are single celled photosynthetic members of marine plankton.
- Depending on the pigment color, they can be yellow, brown, green, or red.
- Certain blooms can be toxic to marine life
- Certain species cause a red tide to occur where we see an enormous “bloom” or growth rate.
Diatoms
- Protists
- Unicellular algae with a glass-like appearance consisting of SiO2 wall structure
- Over 5000 species exist
Algae
- protist
- can be unicellular, multi-cellular, or colonial
- golden (chrysophyta)
- brown (kelp) (phaeophyte)
- green (chlorophyta)
- red (rhodophyta)
For Dat remember phyta
What is the difference between an colonial organism, unicellular organism, and multicellular organism
- unicellular: Only one cell
- multicellular: Made up of multiple cells. Cells can’t survive on their own.
- colonial: Made up of multiple cells in a biofilm. Cells can separate and survive on their own.
Ameoba
- protist
- unicellular
- move by pseudopodia
- fresh water
- Most feed on bacteria, algae, and even some protozoans
Plasmodium
- protists
- unicellular
- Causes malaria
- A type of sporazoan
What is a sporazoan
Protist
A strictly parasitic protozoan that often have a sexual lifecycle involving multiple hosts.
Ex: Malaria being passed from mosquitoes to humans
Paramecium
- Protists
- Unicellular
- Contains a contractile vacuole that is used as a water pump to expel water for speed
- Have cilia for swimming
- Freshwater and marine habitats
- They are built for speed
Slime Molds
- Protists
- unicellular
- Free living and quite predatory
- They creep around like animals and engulf food, especially bacteria.
Why are heterozygotes of Sickle cell anemia able to survive malaria better?
- The sickle cells have a much shorter life span than normal red blood cells.
- The plasmodium spends most of it’s life in red blood cells, but isn’t able to complete its lifecycle in a sickle cell
Plastid
A specific family of related organelles that includes chloroplasts and chromoplasts. Anything ending in plast is a plastid
Protist mitochondrial genomes
Protists contain the most diverse mitochondrial genomes, having five different types
