Multiple choice

A spongy tissue velamen is present in the:

  1. breathing roots

  2. parasitic roots

  3. tuberous roots

  4. epiphytic roots
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D Correct answer
Explanation

Velamen is a spongy, multiple-layered epidermis found in epiphytic roots (roots of plants growing on other plants, like orchids). It absorbs and retains water from the atmosphere. Breathing roots (pneumatophores) have lenticels, parasitic roots have haustoria, and tuberous roots are for storage, not characterized by velamen.

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