A prokaryotic autotrophic nitrogen fixing symbiont is found in

Options

A. Cycas
B. Cicer
C. Pisum
D. Alnus

Answer

A

Explanation

(a) the coralloid root of Cycas is symbiotically associated with nitrogen fixing blre-green algae, Anabaena cycadae and Nostoc punctiforme. These blue green-algae (cyanobacteria) are prokaryotic, photosynthetic and autotrophic.