Question

Diffusion of water into endodermis takes place through ?

• A. Casparian strips
• B. Passage cells
• C. Both A and B
• D. Special pores

Answer 1

The correct option is B Passage cells

Cells of endodermis are covered with Casparian strips and do not allow free movement of water across the endodermal layer. However, in some plants endodermal layer is punctured by the presence of thin-walled passage cells through which water can pass easily. The passage cells are positioned against protoxylem so that water can easily enter the vascular bundles for transportation along the transpiration stream.

So, the correct answer is option B.