section_path: Symbiotic algae
section_name: Symbiotic algae
paragraph_text: Symbiotic algae
  
  Some species of algae form symbiotic relationships with other organisms. In these symbioses, the algae supply photosynthates (organic substances) to the host organism providing protection to the algal cells. The host organism derives some or all of its energy requirements from the algae. Examples are: