Question

Apogeotropic roots in Cycas look like corals of anthozoans (coelenterata) showing mutual association.

• A. Cyanobacteria
• B. Bacteria
• C. Fungi
• D. Obligate parasite

Answer 1

The correct option is A Cyanobacteria

The apogeotropic or positively geotropic roots appear in Cycas sporophyte are called Corolloid roots or Corollorhiza. These roots looks like anthozoans or coelenterates. They contain Blue green algae or cyanobacteria like Nostoc and Anabaena, and perform symbiotic nitrogen fixation. They show mutual association with plant body.

So, the correct option is ‘Cyanobacteria’.