Multiple choice

The small thin-walled and elongated cells associated with each sieve element are known as

  1. sieve plates

  2. companion cells

  3. phloem fibres

  4. wood fibres

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Companion cells are specialized parenchyma cells associated with sieve elements in phloem. They are metabolically active and support the sieve elements in transport functions. Sieve plates are porous structures on sieve element end walls.