protists
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what is a synapomorphy for a eukarya?
nuclear envelope
what type if group is a protist?
paraphyletic group
where do protists tend to live?
in environments surrounded by water.
one of the worlds most infectious diseases that is a protists
malaria
the name if the species that is malaria
plasmodium
why does shellfish poisoning occur?
Algal blooms release toxins that shellfish filter out as food and then we eat the shellfish
photosynthetic protists that cause harmful algal blooms
dinoflagellates
the main species at the base of food chains in aquatic environments are
protists ( one of which includes plankton)
proposes that mitochondria originated when a bacterial cell took up residence in another cell about 2 billion years ago
endosymbiosis theory
what is a protist?
all eukaryotes excluding fungi, land plants, and animals
organelles that whip back and forth to produce swimming movements
flagellum
diatoms and other organisms that drift in open oceans or lakes
plankton
many species at the base of food chains in aquatic environments are..
protists
major protists
ameobozoa opisthokonta excavata plantae rhizaria alveolata stramenophila
what is one synapomorphy of am ameobozoa?
cells lack walls
ameobozoa include the species of
plasmodial slim molds
key traits of excavata
• “excavated” feeding grooves found on the side of the cell - most lack a typical mitochondria
key features if plantae
cells have chloroplast with double membranes
where did plantae come from?
a common ancestor that engulfed a Cyanobacteria–> chloroplast (yay!)
what are some features of rhizaria?
-they are single felled amoebae that lack cell walls (though some have shell- like coverings)
what are some key traits of alveolata?
small sacks, called alveoli, that are located just under their plasma membranes
what is a key trait of stramenophila?
if flagella are present- cells usually have 2- one of which is covered with hairlike projections
protists have…
• )either a mitochondria or genes that are normally found in a mitochondria • ) a nucleus or endomembrane system • ) a cytoskeleton
endosymbiosis
occurs when an organism of one species lives inside the cells of another species