Question

Passage cells are thin walled cells found in

• A. Endodermis of roots facilitating rapid transport of water from cortex to pericycle
• B. Phloem elements that serve as entry points for substances for transport to other plants parts
• C. Testa of seeds to enable emergency of growing embryonic axis during seed germination
• D. Central region of style through which the pollen tube grows towards the ovary

Answer 1

The correct option is A Endodermis of roots facilitating rapid transport of water from cortex to pericycle

Cells of endodermis are tightly packed without any intercellular spaces and have casparian strips on their walls, which block the apoplast pathway and stop water flow from cortex to pericycle. Hence, at places the endodermis layer is "punctured" with thin walled passage cells, which allow water flow to pass through them.

So, the correct answer is 'Endodermis of roots facilitating rapid transport of water from cortex to pericycle'