Multiple choice

In some endodermal cells of roots opposite to protoxylem patches, the inner and outer tangential walls are thin. Such cells are called

  1. passage cells

  2. sclereids

  3. epiblema

  4. All of the above
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A Correct answer
Explanation

Passage cells (also called transfusion cells) are thin-walled endodermal cells found opposite to protoxylem patches. They lack Casparian strips and allow water and minerals to bypass the endodermal barrier, facilitating transport to the xylem. Sclereids are thick-walled supportive cells, and epiblema (rhizodermis) is the root epidermis.

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