Choose your answer before opening the explanation. This is a learning exercise, not a competency assessment.
Why must the substrate be clean?
- Because mushrooms need sunlight
- Because other fungi and bacteria compete for the same food
- Because mycelium dislikes water
- Because spores are poisonous
See the answer and why
Because other fungi and bacteria compete for the same food Contamination is competition for food; clean substrate gives your fungus a head start.

