(A) Winged pollen grains are a characteristic feature of $Pinus$ (a gymnosperm). These wings are formed by the expansion of the exine (outer layer of

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(A) Winged pollen grains are a characteristic feature of $Pinus$ (a gymnosperm). These wings are formed by the expansion of the exine (outer layer of the pollen wall) and help in the dispersal of pollen grains by wind (anemophily). $Cycas$,Mustard,and Mango do not possess winged pollen grains.