A) one microsporangium on abaxial side
B) two microsporangia on adaxial side
C) two microsporangia on abaxial side
D) one microsporangium on adaxial side.
Correct Answer: B
Solution :
: In Pinus a pair of microsporangia occurs on the ventral (adaxial) surface of the microsporophyll while the dorsal surface (abaxial) is sterile. Each microsporangium is a small sessile and elongated sac like structure having two-layered wall.
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