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Question 91

Which structure between adjacent phloem sieve-tube elements has pores through which sap can pass?

  1. A porous sieve plateCorrect answer
  2. A sealed xylem wall
  3. A stomatal pore
  4. A root-hair tip

Explanation

A sieve plate is an end region pierced by pores, allowing sap to move between neighbouring sieve-tube elements. An impermeable end wall would block this movement and defeat the connection between the elements.

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Question 91: Which structure between adjacent phloem sieve-tube elements… · Cells and Microscopy · Questena