Zoology - Microbes in Human Welfare Question with Solution | TestHub

Anabaenais a genus of filamentous cyanobacteria that exist as plankton. They are known for nitrogen-fixing abilities, and they form symbiotic relationships with certain plants, such asAzolla.Azotobacteris a free-living N₂- fixer diazotroph that has several beneficial effects on the crop growth and yield. It stimulates rhizospheric microbes, protects the plants from phyto-pathogens, improves nutrient uptake and ultimately boost up biological nitrogen fixation. The abundance of these bacteria in soil is related to many factors, mostly soil pH and fertility.