Q. Part of fungal hyphae known to occur inside cortical cells is

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Solution:

Endomycorrhizae : during this type, tips of fungal hyphae pass into cortical cells forming swollen vesicles
or finely branched masses called arbuscules therefore, it's also called VAM (vesicular-arbuscular mycorrhiza). The fungal partner belongs to Zygomycetes / Phycomycetes. Vesicles store phosphorus