Q. Besides paddy fields, cyanobacteria are also found inside vegetative part of :
(a) Psilotum.
(b) Pinus.
(c) Cycas.
(d) Equisetum.
Solution :
Correct option : C Besides paddy fields, cyanobacteria are also found inside vegetative part of Cycas. Cycas has coralloid roots which are irregular, negatively geotropic, dichotomously branched coral like roots. They do not possess root hairs and root caps. Cyanobacteria like Nostoc and Anabaena are present in coralloid roots. They have a symbiotic relationship with these roots.