Supergroup Archaeaplastida

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)