Flashcards in Kingdom Protista Deck (12):
Why are most Protists grouped together?
Because they do not fit into the other Kingdoms.
Are Protists unicellular or multicellular?
Most are unicellular but Algae is multicellular.
What are animal-like protists?
Examples: Ameoba, paramicia--found in ponds
Some species are parasites (sporazoans) ex. Plasmodium vivax
They are animal-like because they consume other organisms for food.
What are fungus-like protists?
Example: slime and water moulds
They are fungus-like because they absorb nutrients from other organisms, living or dead
some slime moulds consume other organisms. some water moulds are parasites
What are plant-like protists?
Example: Euglenoids, diatoms, dinoflagelates
They are plant like because they photosynthesize
some consume other organisms when light is unavailable.
Some live as symbionts within other organisms
Three types of unicellular plant-like protists: Diatoms
single-celled free-floating aquatic organisms
they have diffferent silica walls, glass-like
Three types of unicellular plant-like protists:Dinoflagellates
They have two flagella.
Under conditions like plentiful nutrients, they reproduce. The resulting population explosion is called a Bloom or Algal Bloom
In species that have red photosynthetic pigments, the bloom is referred to as a Red Tide. It produces a toxin that becomes concentrated in the tissues of plankton-eating shellfish. If humans eat those shellfish, they can become seriously ill or die.
Euglenoids (could be considered as plant or animal-like)
have plant and animal-like characteristics (chloroplast and flagella)
have a light-detecting structure called an eyespot
Multicellular plant-like protists (algae)
commonly called seaweeds
grouped into 3 phyla based on colour. Green, Red and Brown Algae.
Can grow 60m tall
Appear to have been the first multicellular organisms on earth