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Q.

Which of the following contain coralloid roots?

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a

Cycas

b

Pinus

c

Lycopodium

d

Dryopteris

answer is A.

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Detailed Solution

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The coralloid roots are found in the Cycas.

  • The symbiotic cyanobacteria live in the root of Cycas and thereby have a role in fixing atmospheric nitrogen.
  •  It is dichotomously branched and greenish-brown in colour and contains an algal zone in the cortex.
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