Review 3 Flashcards
What do most algae contribute to the ecosystem in which they live?
primary producers
What is unique about multicellular algae?
have tissues
Describe dinoflagellates.
two flagella,
cause red tide
What type of cell wall is formed by diatoms?
silica
cell walls called valves
What storage molecules assist diatoms with floatation?
oil
Describe Euglena.
rounded flagellated anterior end,
pointed posterior,
pellicle (protein strips) under plasma membrane,
eyespot
How is Volvox unique?
daughter colonies
Name some of the types of brown algae.
Laminaria (kelp),
Sargassum
How are brown algae used in foods?
as thickeners
Describe red algae.
make chlorophyll a,
cellulose cell walls,
lack centrioles,
store modified starch
Why does Protococcus grow on the north side of trees and buildings?
to avoid drying
What is red tide? Why is it dangerous? What kind of damage does it cause?
dinoflagellates release toxic wastes,
massive fish kills,
toxins concentrate in the bodies of shellfish making them dangerous for human consumption
What types of products contain diatomaceous earth?
toothpaste, pool filters, polishes, etc.
What guides euglenoids toward light?
eyespot
How does Volvox reproduce asexually?
daughter colonies
