Angiosperms · Botany

Which phloem cells are closely associated with sieve tube elements in angiosperms?

  1. Companion cells
  2. Tracheids
  3. Bundle sheath cells
  4. Palisade cells
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Correct answer: Companion cells

Companion cells are closely connected to sieve tube elements by plasmodesmata. They help maintain and regulate the living sieve tube elements.

Difficulty: Medium Question 18 of 20

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