Brown algae are brown due to the large amounts of carotenoids they produce, primarily one called fucoxanthin. These organisms are exclusively multicellular and can get so large that they require speci...Brown algae are brown due to the large amounts of carotenoids they produce, primarily one called fucoxanthin. These organisms are exclusively multicellular and can get so large that they require special conductive cells to transport photosynthates from their blades down to the rest of their tissues. In the space below, label the morphology of a brown algal thallus. Much like Saprolegnia, the body of an alga is termed a thallus because it is not differentiated into specialized tissues.
