Mycorrhiza is correctly described as:

Explanation

Mycorrhiza is correctly described as b. Symbiotic relationship between fungi and roots of some higher plants. Let's explain each option and provide more details: Parasitic association between roots and some fungi (a): This statement is not accurate. Mycorrhizal associations are typically mutualistic rather than parasitic. In mycorrhizal symbiosis, both the fungi and the plant benefit from the relationship. Symbiotic relationship between fungi and roots of some higher plants (b): This statement is correct. Mycorrhiza is a mutually beneficial association between certain fungi and the roots of many higher plants. The fungi assist in nutrient uptake, especially phosphorus and other minerals, while the plant provides the fungi with carbohydrates. Symbiosis of algae and fungi (c): This statement is not accurate. Mycorrhiza involves fungi and plant roots, not algae. The association you are describing is more closely related to lichens, which involve algae and fungi. Relation of ants with the stem of some trees (d): This statement is unrelated to mycorrhiza. It describes a different ecological interaction, which is not connected to the mycorrhizal symbiosis. Correct Answer: Mycorrhiza is correctly described as a "Symbiotic relationship between fungi and roots of some higher plants" (b). Summary: Mycorrhiza is a mutualistic association between certain fungi and the roots of many higher plants. In this symbiotic relationship, fungi assist plants in nutrient uptake, especially phosphorus and other minerals, while plants provide carbohydrates to the fungi. This mutually beneficial association is essential for the health and growth of many plants.