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Coralloid roots of Cycas has...

Coralloid roots of Cycas has

A

Anabaena

B

Nostoc

C

Mycorrhizae

D

Rhizopus

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The correct Answer is:
A
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[A] : Coralloid root of Cycas is confined to bacterial zone. [R] : Nucleus is absent in young sieve cells .

Which organism remains associated with coralloid roots of Cycas ? What is the nature of association and what function does the organism perform inside the Cycas roots ?

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