Question

Anabaena is found in roots of

• A. Rice
• B. Cycas
• C. Sorghum
• D. All of the above

Answer 1

The correct option is B Cycas

Anabaena is found in roots of Cycas. The photosynthetic Cyanobacteria are the free-living organisms in pioneer habitats. They also form symbiotic associations with other organisms such as the water fern, Azolla, and cycads. The association with Azolla, cyanobacteria (Anabaena azollae) are important for nitrogen inputs in rice paddies, especially if the fern is allowed to grow and then ploughed into the soil to release nitrogen before the rice crop is sown.

Anabaena is a genus of filamentous Cyanobacteria that exists as plankton.

So, the correct answer is option B.