Mycorrhiza is
(a) a symbiotic association of plant roots and
certain fungi
(b) an association of algae with fungi
(c) a fungus parasitising root system of higher
plants
(d) an association of Rhizobium with the roots
of leguminous plants
Answers
Answer:
The answer of this question is option a
Mycorrhiza is - (a) a symbiotic association of plant roots and certain fungi
Fungus play important role in plants nourishment by increasing their surface area and providing nutrients.
The relationship is symbiotic which means both the organisms are benefitted with the relation.
Fungus receives carbohydrates required for their growth. Mycorrhiza are of two types, ectomycorrhiza and endomycorrhiza.
The association of algae with fungi is known a lichen. The relationship here too is symbiotic, again providing fungus with carbohydrates for their growth.
Algae are provided protection from filaments of fungi.
In the association of Rhizobium with the roots of leguminous plants, the atmospheric nitrogen is made available to the plants by the bacteria.
Bacteria are provided with nutrients making the relationship symbiotic.