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Question

Epiphytes like Vanda, develop a special layer of absorptive tissue velamen consisting of 4 or 5 layers of long polygonal cells. Velamen is formed by


A

Stilt roots

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B

Prop roots

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C

Hanging roots

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D

Climbing roots

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Solution

The correct option is C

Hanging roots


The correct option is C

Explanation of the correct option:

  1. The epiphytes like Vanda do not have roots in the soil. These absorb water from the moisture in the air.
  2. They have hanging roots, the water-absorbing roots having a special tissue velamen.

Explanation of the incorrect options:

Option A:

Stilt roots are the aerial roots growing downwards from the basal node. It is absent in Vanda.

Option B:

Prop roots are absent in Vanda that develop from the stem's upper part and go down into the soil for the plant to stand erect.

Option D:

Climbing roots occur in plants having weak stems and help the plants in climbing.

Final Answer: Epiphytes like Vanda, develop a special layer of absorptive tissue velamen consisting of 4 or 5 layers of long polygonal cells. Velamen is formed by hanging roots.


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