PROTISTS (lesson five) Flashcards
what are Protists
simple eukaryote organisms that don’t fall under plants, animals, or fungi.
are protists diverse?
yes, protists are the most diverse kingdom of eukaryotes.
protists can be:
- small or large
- -Stationary or mobile
-Aquatic or terrestrial
Are protists multi-cellular or uni-cellular
protists can be both
Where do protists live?
In wet or damp enviroments
What is the protist disease that is the greatest concern to humans?
Malaria
-Carried in mosquitos
-Caused by several species of Plasmodium
what is Plasmodium?
Plasmodium can cause malaria. Malaria This disease is caused by several species of Plasmodium, (which is a single-celled protist)
what is Giardia lamblia
This is a common intestinal parasite that can give you Giardiasis or “beaver fever”
what is Trichomonas vaginalis
a type of std, different from another kind of STD because it is a parasite (protozoan parasite) while other STDs are bacterial
what is prophyra?
it is a type of protist that is not harmful to us.
- they are in nori the seaweed that wraps sushi rolls, which is the common name for several species of Porphyra
- prophyra is also used in toothpastes, cosmetics, paints, and the food additives agar and carrageenan
Why are Protists Important?
- Protists play a key role in aquatic ecosystems
- They may perform photosynthesis, (acting as the producers)
- they support the macroscopic food pyramids (If they are consumers)
- They also play a role in terrestrial (For example: they are abundant in soil, although their ecological roles are not understood)
what was the first eukaryotes?
kingdom Protists
how was the nucleus developed?
the nucleus was likely developed from the internal folding of the cell membrane
how were mitochondria and chloroplasts likely developed?
Organelles like the mitochondria and chloroplasts likely developed from endosymbiosis of prokaryotic cells
what is endosymbiosis?
Endosymbiosis is when one type of cell is taken in and lives within another cell
is there a typical protist?
Because of the diversity in the evolutionary pathway for any protist, there is no “typical” protist
Protist Characteristics
- they have different energy sources,
- key cellular features,
- modes of reproduction,
- and interactions with their environment
What characteristics differentiate Kingdom Proista from being put in other kingdoms?
-Cell walls are made up of cellulose and not chitin like Fungi
-Had given rise to members of kingdom Plantee, and have different reproduction methods from it
-Animal-like protists are believed to have given rise to all larger organizations in the kingdom Animalia
Whose ancestors gave rise to fungi, plants, and animals?
protists
What are 3 ways of locomotion for protists?
- Cilates (Hair like)
- Flagellates (whip/tail-like)
- pseudopodia (fake foot made from cytoplasm)
what is pseudopodia?
a type of locomotion, able to extend some of the cytoplasm to make a foot or two
How is Kingdom Protista used as a matter of convenience?
ANY species that do not fit into the other kingdoms are put into the kingdom Protista
-It is sort of like a “catch-all”
What organisms does Kingdom Protista include?
Every eukaryotic organism that isn’t…
-Plant
-Fungi
-Animal
KEEP IN MIND ORGANISMS IN KINGDOM PROTISTA CAN BE MULTICELLULAR OR UNICELLULAR
