Which pigment gives brown algae their characteristic color?
Fucoxanthin, a xanthophyll pigment, gives brown algae (Phaeophyceae) their characteristic color. This follows from NCERT principle where relation explains outcome clearly for students.
Ref: NCERT Biology Textbook for Class XI and XII (Botany section), Chapter: Biology - Botany portion covering relevant concept, Topic: Plant structure, physiology and applications.