Which of the following symbiotic associations | vedclass

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(B) Biofertilizers are organisms that enrich the nutrient quality of the soil. $A$. $Rhizobium$ forms a symbiotic association with leguminous roots to

Vedclass · Accepted Answer

Algae and fungi

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(B) Biofertilizers are organisms that enrich the nutrient quality of the soil. $A$. $Rhizobium$ forms a symbiotic association with leguminous roots to fix atmospheric nitrogen. $B$. Algae and fungi (Lichens) are symbiotic associations,but they are not used as biofertilizers in agriculture. $C$. $Azolla$ (a water fern) and $Anabaena$ (a cyanobacterium) form a symbiotic association that fixes nitrogen,commonly used in rice fields. $D$. Roots of higher plants and fungi form mycorrhizae,which help in phosphorus absorption and are considered biofertilizers. Therefore,the correct answer is $B$.

Which of the following symbiotic associations is not useful as a biofertilizer?

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