Besides paddy fields,cyanobacteria are also f | vedclass

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(D) The correct answer is $D$. In $Cycas$,specialized roots known as coralloid roots are formed. These roots show a symbiotic association with nitroge

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Cycas

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(D) The correct answer is $D$. In $Cycas$,specialized roots known as coralloid roots are formed. These roots show a symbiotic association with nitrogen-fixing cyanobacteria,such as $Nostoc$ and $Anabaena$. Coralloid roots are irregular,negatively geotropic,and dichotomously branched,resembling coral structures. They lack root hairs and root caps,and the cyanobacteria reside in the cortical region of these roots to provide fixed nitrogen to the plant.

Besides paddy fields,cyanobacteria are also found inside the vegetative part of

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