how delicate and soft fungal hyphae able to penetrate the hard timber
 

Please find below the solution to the asked query

The fungi produce various acids. These acids soften and decay the hard timber, stones etc making organic compounds available for fungi. They also produce enzymes outside that results in breakdown of these organic compounds into simpler form which are then absorbed inside the cells.

Hope this information will clear your doubts about the fungi.
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  • 3
They use some sort of acid to dissolve the hard wall
  • -2
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