In angiosperms, root hairs arise from which one of the following regions of the root?

Core Logic

Bulliform cells are large, empty, colourless epidermal cells found on the adaxial surface of grass leaves. During water stress (scarcity), they lose water, become flaccid, and cause the leaves to curl inwards to minimize exposed surface area, thereby reducing water loss through transpiration.

Step 1: Final Conclusion

Their main function is to minimize water loss during water stress.

Pattern Recognition

Bulliform cells = Grass leaves rolling/curling = Water conservation mechanism.

Chapter Mix

Class 11 Biology: Anatomy of Flowering Plants

Core Logic

• Conjunctive tissue (A) is the parenchymatous tissue that lies between the xylem and phloem patches in roots. (A-III)
• Casparian strips (B) are suberin depositions forming a water-impermeable band in the cell walls of endodermal cells. (B-IV)
• Subsidiary cells (C) are specialized epidermal cells found adjacent to and supporting the guard cells in stomata. (C-I)
• Starch sheath (D) is a term used for the endodermis in dicot stems because its cells are rich in starch grains. (D-II)

Step 1: Final Conclusion

The correct matches are A-III, B-IV, C-I, D-II.

Pattern Recognition

Casparian strips exclusively map to endodermal cells with suberin (B-IV). This immediately isolates the correct combinations, and subsidiary cells uniquely relate to stomata/guard cells (C-I).

Chapter Mix

Class 11 Biology: Anatomy of Flowering Plants