ANSWER:
The tree that grew from the seed achieved a final mass that changed very little for years afterward because the tree went under anabolic and catabolic reactions when it was "young and growing" and both continue now even though the "tree" reached a "stable mass".
Step-by-step explanation:
- A catabolic reaction occurs when the food molecules that a tree consumes are broken down or oxidized in order to discharge energy.
- Meanwhile, the anabolic reaction is an array of metabolic pathways which creates "molecules" from smaller units.