Vascular Tissue · Botany

What are sieve plates in phloem primarily used for?

  1. Increasing the rate of water absorption from the soil
  2. Allowing phloem sap to move between sieve tube elements
  3. Producing lignin for reinforcing secondary cell walls
  4. Preventing the movement of sugars between adjacent cells
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Correct answer: Allowing phloem sap to move between sieve tube elements

Sieve plates are porous end walls between adjacent sieve tube elements. Their pores allow phloem sap to move through the sieve tube system.

Difficulty: Medium Question 7 of 20

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