13. Where would you find a megasporangium in an angiosperm?
(A) within an ovule contained within an ovary of a flower
(B) producing a megaspore within the archegonium of the female gametophyte
(C) at the base of a sporophyll in an ovulate cone
(D) enclosed in the stigma of a flower
(E) packed into pollen sacs within the anthers found on a stamen
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