A weightless object will have no mass, regardless of whether it is in free fall or whether it's not in free fall. An object that is only weightless during free fall will, however, have mass when it's not in free fall.
Plant stem cells are innately undifferentiated cells located in the meristems of plants. Plant stem cells serve as the origin of plant vitality, as they maintain themselves while providing a steady supply of precursor cells<span> to form differentiated tissues and organs in plants</span>
The structures allow the cell to perform specific functions.
