What is the special features for red algae?
Red algae have unique characteristics such as the presence of phycoerythrin, a pigment that gives them their red color and allows them to photosynthesize in deep water where other algae cannot. They also have complex life cycles with alternation of generations, and their cell walls are made of cellulose and agar. Additionally, red algae are used in various industries for producing agar-agar, carrageenan, and as a food source in many Asian countries.