Multiple choice

Secondary phloem remains functional generally

  1. for one year

  2. for less than one year

  3. for more than one year

  4. for as long as the plant lives
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Secondary phloem is formed by vascular cambium during secondary growth in vascular plant. Generally, it remains functional for one year but in some plants more than one year, e.g. Tilia and Salix.

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