In symbiotic relationships, what type of relationship do mycorrhizal fungi have with most plants?

• A. Mutualism (both the fungus and the plant benefit)
• B. Commensalism (the fungus benefits while the plant is unaffected)
• C. Parasitism (the fungus benefits while harming the plant)
• D. Amensalism (the plant is harmed while the fungus is unaffected)

Answer: (A)

Verified step by step guidance

1. Step 1: Understand the definition of symbiotic relationships, which are close and long-term biological interactions between two different biological organisms.
2. Step 2: Review the types of symbiotic relationships: Mutualism (both benefit), Commensalism (one benefits, the other unaffected), Parasitism (one benefits, the other harmed), and Amensalism (one harmed, the other unaffected).
3. Step 3: Learn about mycorrhizal fungi, which form associations with plant roots, enhancing nutrient and water uptake for the plant.
4. Step 4: Recognize that in this relationship, the fungus receives carbohydrates produced by the plant through photosynthesis, while the plant gains improved access to soil nutrients.
5. Step 5: Conclude that since both the fungus and the plant benefit from this interaction, the relationship is classified as Mutualism.