A) normal root of Cycas
B) coralloid root of Cycas
C) normal root of Pinus
D) stem of Cycas
Correct Answer: B
Solution :
The cortex in coralloid roots of Cycas is divided into inner and outer regions by algal zone. The cells of this zone contain endophytic algal forms particularly Annbaena cycadeae and Nostoc punctiforme.
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