Multiple choice

The velamen is the characteristic of ________ root.

  1. Ivy

  2. Orchids

  3. Corn

  4. Fig
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Some orchids like Vandas are epiphytic and grow on trees without hurting them. The orchids derive moisture and nutrients from the air and rain with their aerial roots that can be a few yards long. Older roots have a spongy outer layer called a velamen that can absorb moisture in the air and make it available to the plant. Some have chlorophyll so can manufacture food for the orchid.

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