Multiple choice

Transport proteins of endodermal cells are control points,where a plant adjusts the quantity and types of solutes that

  1. Reach the phloem

  2. Reach the xylem

  3. Both

  4. None
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The endodermis acts as a checkpoint for water and solutes entering the vascular cylinder (xylem) from the root cortex, ensuring selective uptake.

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