Which of the following genera is associated with coralloid roots?

Cycas

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Taxus

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Pinus

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Sequoia

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Solution

The correct option is A Cycas
Roots in Cycas are of two types - normal and coralloid. Coralloid roots are irregular, negatively geotropic, dichotomously branched coral-like roots which do not possess root hair and root caps. Coralloid roots have a symbiotic association with cyanobacteria like Nostoc and Anabaena.

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Cycads have cyanobacteria on its roots which forms coralloid roots and help in which of the following?

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