Which set of conditions is favorable for fungi to grow in wood?

Which set of conditions is favorable for fungi to grow in wood?

• A. Temperature: 60 to 70 F; Oxygen: 10%; Moisture below 10%; Food: glue
• B. Temperature: 50 to 60 F; Oxygen: 5%; Moisture: 5%; Food: water
• C. Temperature: 75 to 85 degrees F; Oxygen: 20% of volume of wood must be air; Moisture: at least 20%; Food: the bridge
• D. Temperature: 90 to 100 F; Oxygen: 50%; Moisture: 5%; Food: metal

Answer: (C)

Fungi need three things to grow in wood: warmth, enough moisture, and oxygen, plus a food source (the wood itself). The favorable scenario provides a warm range around 75–85°F, which falls inside the common growth range for many wood-rotting fungi. It also offers ample oxygen—about atmospheric levels—so the fungi can respire as they grow. The moisture is at least about 20%, giving enough free water for metabolic processes. With wood as the nutrient source, there’s a ready supply of food for the fungal network to expand. The other options fail because they either lowball the moisture, push the temperature outside the optimal range, or present an unsuitable "food" source (for example, substances like glue or metal are not the typical nutrient for fungi, and moisture or temperature levels that are too dry or extreme hinder growth).

Fungi need three things to grow in wood: warmth, enough moisture, and oxygen, plus a food source (the wood itself). The favorable scenario provides a warm range around 75–85°F, which falls inside the common growth range for many wood-rotting fungi. It also offers ample oxygen—about atmospheric levels—so the fungi can respire as they grow. The moisture is at least about 20%, giving enough free water for metabolic processes. With wood as the nutrient source, there’s a ready supply of food for the fungal network to expand.

The other options fail because they either lowball the moisture, push the temperature outside the optimal range, or present an unsuitable "food" source (for example, substances like glue or metal are not the typical nutrient for fungi, and moisture or temperature levels that are too dry or extreme hinder growth).