Which of the following statements accurately describes the organization of shoot and root apical meristems and their role in plant development?
1
The shoot apical meristem (SAM) generates flower primordia exclusively, without contributing to the formation of leaves or stem tissues in both Arabidopsis and Antirrhinum.
2
Root apical meristem (RAM) in Arabidopsis is primarily responsible for the development of lateral roots and has no role in the elongation of the primary root.
3
In Arabidopsis, the WUSCHEL (WUS) gene is expressed in the root apical meristem (RAM) to maintain the stem cell population, similar to its role in the shoot apical meristem (SAM).
4
The shoot apical meristem (SAM) and root apical meristem (RAM) contain a central zone of undifferentiated cells that are maintained by a surrounding peripheral zone in which cell division is more frequent, contributing to the growth and organ formation in plants like Arabidopsis.