Which are the organisms help in nitrogen fixation of lichens: (a) Anabaena and Nostoc (b) Anabaena alone (c) Nostoc alone (d) Anabaena azollae

Which are the organisms help in nitrogen fixation of lichens: (a) Ana

1.	Which are the organisms help in nitrogen fixation of lichens: (a) Anabaena and Nostoc (b) Anabaena alone (c) Nostoc alone (d) Anabaena azollae
Answer» (a) Anabaena and Nostoc