Which of the following associations fixes nitrogen through non- nodulation?
Answers
Answered by
0
Answer:
Cycads form mutualistic, facultative symbioses with nitrogen fixing cyanobacteria (blue-green algae). Cycads provide fixed carbon and a stable environment to the cyanobacteria in exchange for fixed nitrogen. These cyanobacteria are endosymbionts, living within the roots of Cycads. Cyanobacteria within the coralloid roots of cycads are chemoheterotrophic. All cyanobacteria in symbiosis with cycads have the ability to fix nitrogen. Biologically fixed nitrogen makes up 90% of the nitrogen available globally for use by plants and animals.
Therefore, the correct answer is option C.
Explanation:
Similar questions