Question

Hyphae of bread mould that penetrate the substrate?​

Answer 1

When the mold comes in contact with a substrate, such as bread, it first spreads over the surface and penetrates it while sending hyphae inward to absorb the nutrients.

Step-by-step explanation:

Rhizopus stolonifer grows primarily as mycelia, which consists of long filamentous cells, or hyphae, that lack cross walls, known as septa.