Final answer:
Apples possess a core, which is the small hard inner region that holds the seeds. The apple's growth is dependent on the initial number of cells present after fertilization, and these cells expand but do not increase in number as the fruit matures.
Step-by-step explanation:
Apples have a core, which is the small hard inner part of the fruit that encloses the seeds. Fruits generally consist of three parts: the exocarp (outermost skin), the mesocarp (middle part), and the endocarp (inner part), collectively known as the pericarp. As an apple matures, the cells of the fruit expand, but no new cells are added, enabling the apple to grow to its mature size, which is dependent on conditions in late spring, not those during the summer. The structure that encloses the seed, which is part of the fruit, develops from the ovary after fertilization has occurred.