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red algae
-marine, multicellular seaweed
-chloroplasts include phycoerythrin which is an accessory pigment that helps absorb light deeper in water
what does phycoeryrhrin work in conjunction with?
chlorophyll
what is used from red algae that humans eat?
carrageenan thickener for ice cream, agar for petri dish cultures, and food in diff parts of asia
what is carrageenan and agar?
cellulose and unique wall polysaccharides extracted from the cell wall of red algae
cholorphytes
green algae (charophytes) or chloroplasts same as in plants
who in archaeplastida have a common anscestor?
charophytes and land plants
who did charohpytes evolve from?
chlorophytes
what are characteristics of chlorophytes ?
-most are freshwater; marine
-bi-flagellated cells
-perform aerobic respiration w/subcellular organelles
what’s a unicellular form of chlorophytes ?
phytoplankton an example is Chlamydomonas
what are colonial forms of chlorophytes ?
Volvox, Scenedesmus, and Gonium
scenedesmus
simple colony; 4 cells
Gonium
small colony; 16 cells
Volvox
large colony interconnected by cytoplasmic bridges; 500-60,000 cells
what is a multinucleate single celled Chlorophyte?
Caulerpa
characteristics of Caulerpa
-lives in intertidal zone where land meets water
-nucleus divides but cytoplasm doesn’t
what’s are examples of multicellular forms of Chlorophytes ?
freshwater algae and seaweeds
freshwater algae Chlorophyte
Cladophora
seaweed Chlorophyte
Ulva (edible sea lettuce that has flattened structure)
