NEETBotanyPlant - Growth and Development
Read the following anatomical events in plant development: Event X: Formation of interfascicular cambium from fully differentiated medullary ray cells. Event Y: Formation of secondary xylem elements from the vascular cambium. Event Z: Maturation of root apical meristem cells into root hair cells. Identify the developmental processes that correspond to Events X, Y, and Z respectively.
Options
- AX - Differentiation, Y - Dedifferentiation, Z - Redifferentiation
- BX - Dedifferentiation, Y - Redifferentiation, Z - Differentiation
- CX - Redifferentiation, Y - Dedifferentiation, Z - Differentiation
- DX - Dedifferentiation, Y - Differentiation, Z - Dedifferentiation
Correct answer
B. X - Dedifferentiation, Y - Redifferentiation, Z - Differentiation
Step-by-step solution
Event X represents dedifferentiation. Living differentiated cells (medullary ray cells) regain the capacity to divide to form a meristem (interfascicular cambium). Event Y represents redifferentiation. The cells produced by the dedifferentiated meristem (vascular cambium) lose the capacity to divide and mature to perform specific functions (secondary xylem). Event Z represents differentiation. Cells derived from primary meristems (root apical meristem) undergo structural changes to mature into specific cells like r