Answer:
Origin of Heterospory:
The fossil evidence indicates that some sporangia of the plant contained both small and large spores, though the size differences are not so pronounced. So a single sporangium contained both microspores and megaspores. At a later period, the microsporangia and megasporangia might have been differentiated.
<span>coastal zone .
mountain zone .
rainforest zone .</span>
A mis hermanas les encanta ALMORZAR papas fritas en el jardín a la 1 en la tarde.
