plant-like protists Flashcards
1
Q
what are the diff forms
A
freshwater or marine forms
2
Q
characteristic of the cells
A
unicellular and multicellular
3
Q
what are in green algae and diatoms cell walls (algae)
A
- green algae have cellulose in cell walls
- diatoms have silica in their cell walls
4
Q
how do diatoms store glucose
A
- oil , responsible for petroleum deposit
5
Q
hoe does green algae store glucose
A
- as starch
6
Q
characteristics of green algae
A
- some are single celled : desmids
- some are colonial : volvox
- some are multicellular : seaweed
- some are important commercially ; food, agar, used as thickening agents
7
Q
what are the closest relatives to land plants, how did it happen
A
- green Algae
- a heterotrophic protist aquired a cyanobacterial endosymbiont
8
Q
characteristics of dinoflagellates (Red algae)
A
- diverse, abundant component of of marine and freshwater phytoplankton
- most are unicellular photosynthetic, flagellated
-foundation of food chains for coral reefs
9
Q
what causes red tides
A
- blooms of dinoflagellates
- water is discolored red/brown, becomes toxic, acts as neurotoxin
10
Q
what are mutualistic dinoflagellates
A
- zooxanthellae: unucellular yellow-brown algae which live symbiotically with coral reefs
- provide corals with food in the form of photosynthetic products, coral provides protection, CO2 and access to light and protection
11
Q
characteristics of diatoms : red algae
A
- contains silica in cell wall
- yellow-brown chloroplasts, enables them to photosynthesis
- no flagella or cilia
- diatomaceous earth
