Q. Red Algae:

1. are responsible for the red color observed in the Red Sea.
2. cause the red rust disease in tea plants.
3. are responsible for occurrence of red tides in marine environments.

Which of the above statements is / are correct?
Answer: None of them
Notes: Red color of the Red Sea is due to bloom of blue-green algae (Trichodesmium erythraeum). Red rust of tea is caused by green algae (Cephaleuros virescens). Red tides are due to dinoflagellates (Pyrrophyta), not red algae (Rhodophyta). Therefore, none of the statements are correct.