A) seed is winged but pollen grains are not
B) both seed and pollen grains are wingless
C) pollen grains are winged but seed is not
D) both seeds and pollen grains are winged
Correct Answer: D
Solution :
Pollen grains of Pinus are protected by three wall layers. The outermost called exine or cappo, the middle is exointine or capulla (forms two baloon like outgrowths called wings) and inner intine. The mature seeds are also winged having thin layer of ovuliferous scale which forms the wing.
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