A) It roots contain some blue-green algae
B) It does not have a well organized female flower
C) It has circinate vernation
D) Its xylem is mainly composed of xylem vessel
Correct Answer: D
Solution :
[d] Vessels are absent from the xylem of all gymnosperms (except Gnetales). Cycas belongs to Cycadales (not Gnetales).
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