Q. Red algae is responsible for which of the following?

1. Red color of the red sea
2. Red rust of tea
3. Red tides

Select the correct option from the codes given below:
Answer: None of them
Notes: Red color of red sea:
Red sea is not actually red, but sometimes it appears that way. Red Sea got its name because of a type of blue-green algae called Trichodesmium erythraeum, which is found in the sea. When these blooms of algae die off they appear to turn the blue-green color of the ocean to a reddish-brown.
Red Rust of Tea
It is caused by Cephaleuros virescens which is Green algae. The species of same Genus cause rust in coffee, mango and guava also.
Red Tide
Red tides are caused by algae from the phylum Pyrrophyta (dinoflagellates), and not red algae (Rhodophyta))

This question is part of UPSC Daily 20 MCQ Series Course on GKToday Android app.