Correct option is B
Explanation-
Statement A: "Root hair, endodermis, xylem and phloem reach maturation in elongation zone of a developing root." - INCORRECT
This is incorrect because maturation of these tissues occurs in the zone of maturation (or differentiation), not the elongation zone. The elongation zone is mainly involved in rapid cell elongation, not full differentiation.
Statement B: "The root epidermal cells that are incapable of forming root hairs are called atrichoblasts." - CORRECT
In root epidermis, cells differentiate into:
1. Trichoblasts → form root hairs
2. Atrichoblasts → do not form root hairs
Statement C: "Quiescent center is present just above root cap." - CORRECT
The quiescent center is a region of slowly dividing cells above the root cap, important in maintaining stem cells.
Statement D: "In Arabidopsis, an auxin transporter (ABCB4) plays a role in root hair emergence by maintaining intracellular auxin concentration." - CORRECT
This is true. ABCB4, an ATP-binding cassette transporter, helps regulate auxin distribution, influencing root hair emergence.
Final Answer:
Option b : B, C and D are correct.
