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
Are hydra protists?
NO! They are in the animal kingdom. They are small multicellular aquatic animals that often get confused for protists
