Coralloid roots are found in

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(C) Coralloid roots are specialized roots developed in the genus $Cycas$,which belongs to the group Gymnosperms.These roots are negatively geotropic,d

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Gymnosperms

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(C) Coralloid roots are specialized roots developed in the genus $Cycas$,which belongs to the group Gymnosperms.These roots are negatively geotropic,dichotomously branched,and apogeotropic.They contain an algal zone in the cortex.This algal zone houses blue-green algae (cyanobacteria) such as $Nostoc$ and $Anabaena$,which live in a symbiotic association with the plant to fix atmospheric nitrogen.

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