Which benefit to alder trees, especially after clear-cutting, occurs through symbiotic bacteria?

💡 Explanation

Alders benefit from nitrogen fixation carried out by symbiotic Frankia bacteria because this increases available nitrogen vital for growth, therefore establishing a base nutrient level, rather than increased water or heavy metal tolerance.

• Which outcome occurs when high metabolic demand exceeds hemoglobin offloading capacity within fish tissues?
• Which outcome limits xylem transport up tall trees when soil moisture drops significantly around root structures?
• Which risk significantly increases if a hibernating mammal experiences sudden environmental warming during early winter?
• Which mechanism powers thermaling behavior minimizing flapping energy?
• Which outcome occurs when comb jellies experience mechanical disturbance?
• Which risk increases when a jellyfish's statocyst fails?