Final answer:
Rapid growth in a tree results in large, widely spaced cells due to the expansion of the vacuole after cell division during periods of favorable environmental conditions for growth.
Step-by-step explanation:
Rapid growth in a tree produces large, widely spaced cells. This occurs because most of the plant's growth is a result of the expansion of the vacuole following cell division. During rapid growth phases, cells produced by the apical and lateral meristems expand significantly, leading to larger cells that are more widely spaced. This type of growth is characteristic of periods when trees experience boosts in growth due to favorable environmental conditions.