Protistz Flashcards
What are protists?
Not prokaryotic, fungi, plants or animals.
Most are unicellular, some are multicellular or colonial.
Most are aquatic.
Incredibly diverse
What are protozoans?
Animal-like protists. Unicellular and heterotrophic. Classified by how they move.
What is the Phylum Zoomastigina?
Flagellates. AKA the motorboats. They move using flagella. Some cause diseases like African Sleeping Sickness, Giardia and Beaver Fever
Protozoans
What is the Phylum Scarcodina?
Amoebeas. AKA the blobs. Move using pseudopods (cytoplasm extensions). Feed using endocytosis. Some cause disease.
Protozoans
What is the Phylum Ciliophora?
Ciliates. AKA the hairy ones. Move by beating tiny hairs called cilia.
Triocysts are used for defense.
Ciliates sweep food into the oral groove where it makes its way into the gullet. A food vacuole then forms to move it into the interior.
They have a micronucleus (stores hereditary info and used in conjugation) and a macro-nucleus (which controls daily functions).
Protozoans
Examples: Paramecium
What is the Phylum Sporozoans?
No nickname because they don’t move. All parasitic and cause diseases
Protozoans
What are algae?
Plant-like protists. They can be unicellular, multicellular or colonial. Autotrophic, have chloroplasts and other photosynthetic pigments. They have holdfasts, stipes and blades (roots, stems and leaves). Algae absorb water from their surroundings
What is the phylum euglenophyta?
Ex: Euglena
Aquatic and unicellular. They move with a flagella. Prefer to be autotrophic but can become heterotrophic in low light conditions.
Unicellular algae
What is the Phylum Pyrrophyta?
Ex: Dinoflagellates
They spin using two flagella and are responsible for red tides. They create potentially deadly toxins
Unicellular algae
What is the Phylum basillariophyta?
Ex: Diatoms
Most abundant in the form of marine algae. Form elaborate silicon shells to protect itself. Shell is porous to allow material in and out.
Unicellular algae.
What is the phylum chlorophyta?
Green algae. Ex: Volvox
Contains chlorophyll. Most found in fresh water. Colonial; cells connected by cytoplasm and may coordinate movement. Reproduction is mostly asexual- a colony forms within a colony.
Multicellular/colonial algae
What is the Phylum Rhodophyta?
Red algae. Found in salt water. Pigments give them a reddish colour. Ex: Seaweed
Multicellular/colonial algae.
What is the Phylum Phaeophyta?
Brown algae. The most plant-like of all the algae. Can grow to huge sizes. Shows alternation of the generations.
Multicellular/colonial algae.
What are fungus-like protists?
All form delicate net-like structures on the surface of their food source. Obtain energy through decomposition of organic material. Cell walls made of black chitin
What is the Phylum Plasmodium?
Slide molds. Live in cold, moist, shady places where they grow on damp organic material. They are a mass of cytoplasm that may contain diploid nuclei but no cell wall or membrane.
This formation is called plasmodium, and is its feeding stage. Creeps along by amoeboid movement.
Forms reproductive structures when its surroundings dry up. Spores are dispersed and grow into new plasmodium.
