Which of the following is a nitrogen-fixing blue-green algae of soil?
Answer Details
The nitrogen-fixing blue-green algae of soil is Anabaena. Anabaena is a type of cyanobacteria that is capable of fixing atmospheric nitrogen into a form that plants can use. It forms symbiotic associations with certain plants, such as rice and Azolla ferns, where it provides them with fixed nitrogen in exchange for carbohydrates. Anabaena is commonly found in soil, freshwater, and marine environments, and it is important for maintaining soil fertility and supporting plant growth.