Suppose you plant a seed and observe that a tree of large mass grows from it. the tree achieves a final mass that changes very little for years afterward. which of the following is true about the tree?

a. both anabolic and catabolic reactions took place in the seed and tree when it was young and growing, but then all reactions stopped when the tree reached a stable mass.
b. both anabolic and catabolic reactions took place in the seed and tree when it was young and growing, and both continue now even though the tree reached a stable mass.
c. only anabolic reactions
d. only catabolic reactions