Kingdom Protista Flashcards
What type of organisms are included in the Kingdom Protista?
Single-celled eukaryotes
Includes Chrysophytes, Dinoflagellates, Euglenoids, Slime moulds, and Protozoans
What is a defining feature of protistan cells?
Well defined nucleus and membrane-bound organelles
How do protists reproduce?
Asexually and sexually through cell fusion and zygote formation
What are Chrysophytes primarily known for?
Including diatoms and golden algae (desmids)
Found in freshwater and marine environments
What are the cell walls of diatoms made of?
Silica
What is diatomaceous earth?
Accumulation of diatom cell wall deposits over billions of years
What ecological role do diatoms play in oceans?
Chief producers
What is a unique characteristic of dinoflagellates?
They have stiff cellulose plates and two flagella
What phenomenon can red dinoflagellates cause?
Red tides
What is the primary habitat of Euglenoids?
Freshwater, particularly stagnant water
What structure do Euglenoids have instead of a cell wall?
Pellicle
How do Euglenoids adapt when deprived of sunlight?
They behave like heterotrophs
What type of nutrition do slime moulds exhibit?
Saprophytic
What structure do slime moulds form under suitable conditions?
Plasmodium
What is the survival feature of spores produced by slime moulds?
Extremely resistant and can survive for many years