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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.


Brown Algae

Can grow 60m tall


Red Algae

Appear to have been the first multicellular organisms on earth


Green Algae

most are in fresh water but some are in salt
most green algae are aquatic, lichen-fungus and algae are land
volvox--ball-shaped colonies--thought to have given rise to multicellular plants