Besides paddy fields, cyanobacteria are also found inside vegetative part of
A
Equisetum
B
Psilotum
C
Pinus
✓
Cycas.
✓
Answer
Correct option: D.
Cycas.
d (d) : Coralloid roots of Cycas have symbiotic association with bluegreen algae like Nostoc and Anabaena. Coralloid roots are irregular, negatively geotropic, dichotomously branched coral like roots which do not possess root hairs and root caps.
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