The disease known as "Red Rust of Tea" is caused by $Cephaleuros$ which is a:

Select the correct option for the cell wall of green algae.

Which characteristic indicates that two species of algae are closely related?

Mannitol is the stored food in

Assertion : Red algae contribute to the production of coral reefs.
Reason : Some red algae secrete and deposit calcium carbonate over their walls.

Hydrocolloid carrageen is obtained from: