A : Azotodesmic lichens are biofertilisers en | vedclass

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(A) Lichens are symbiotic associations between fungi (mycobiont) and algae or cyanobacteria (phycobiont).Azotodesmic lichens are specific types of lic

Vedclass · Accepted Answer

Assertion and Reason both are correct and Reason is the correct explanation of Assertion.

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(A) Lichens are symbiotic associations between fungi (mycobiont) and algae or cyanobacteria (phycobiont).Azotodesmic lichens are specific types of lichens that contain nitrogen-fixing cyanobacteria (such as Nostoc or Anabaena) as their phycobiont component.These cyanobacteria possess specialized cells called heterocysts,which are the sites of nitrogen fixation.By fixing atmospheric nitrogen into ammonia,these lichens enrich the soil with nitrogen,acting as natural biofertilisers.Therefore,both the Assertion and the Reason are correct,and the Reason provides the correct explanation for the Assertion.

$A$ : Azotodesmic lichens are biofertilisers enriching nitrogen contents in soil.
$R$ : This ability is due to the presence of heterocystous blue-green algae as phycobiont component.

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$A$ : Azotodesmic lichens are biofertilisers enriching nitrogen contents in soil.$R$ : This ability is due to the presence of heterocystous blue-green algae as phycobiont component.