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- Why is Entamoeba histolytica often termed as clinically significant amoebic parasiteSuperficially, Apiosporina morbosa (causal agent of black knot of cherry) appears morphologically similar to members of the Xylariales as both produce melanized stroma. However, the former is found in the Class Loculoascomycetes while the latter are found in the Class Pyrenomycetes. Why? Discuss the main differences.Where is Plasmodium falciparum found?