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  • What is the role played by the endodermal cells?Option: 1 They facilitate passive absorption of mineral ions<st

What is the role played by the endodermal cells?

Option: 1

They facilitate passive absorption of mineral ions


Option: 2

They adjusts the quantity and types of solutes that reach the xylem


Option: 3

They actively transport ions in one direction only


Option: 4

Both b and c


Answers (1)

best_answer

Active Absorption of Mineral Ions:

 
  • Specific proteins in the membranes of root hair cells actively pump ions from the soil into the cytoplasm of epidermal cells. 
  • Like all cells, the endodermal cells have many transport proteins embedded in their plasma membrane; they let some solutes cross the membrane, but not others.
  • Transport proteins of endodermal cells are control points, where a plant adjusts the quantity and types of solutes that reach the xylem. 
  • Note that the root endodermis because of the layer of suberin has the ability to actively transport ions in one direction only.

Hence, the correct answer is option d.

Posted by

jitender.kumar

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