-Diatoms: unicellular algae with chlorophyll a and chlorophyll c; pigment: xanthophyll
-Photosynthetic
-Have a hard cell wall made of silicon-dioxide
-Pillbox and radial shapes
-Cell wall persists long after the organism dies, accumulate in layers of diatomaceous earth.
Lab Examples:
-Cyclotella:
Phylum Pyrrhophyta (Dinoflagellates):
-Unicellular
-Cellulose plates give them strange shapes, like armor
-Two flagella located in perpendicular grooves
-Cause red tide: Ptychodiscus bruvis. Blooms of algae that deplete oxygen and produce toxins that kill massive numbers of fish.
-Primary producers in oceans, second only to diatoms
-Heterotrophic or autotrophic, some are bioluminescent.
Lab Examples:
-Peridinium:
-Ceratium:
Phylum Euglenophyta (Euglenoids):
-Unicellular, motile, have two flagella
-Unique in that some are autotrophic, some are heterotrophic, some saprophytic, depending on environmental conditions.
-Chlorophylls a and b
-Distinctive because cell walls are made mostly of protein, which allows for flexibility
-Colored eyespot, for detection of light, near the base of the flagella
Lab Example:
-Euglena:
No comments:
Post a Comment