In this task you will be given a text passage from a trivia quiz. You should choose the category this question belongs to from these categories: History, Science, Social Science, Fine Arts, Literature. You can only choose one category, so if in doubt, please choose the closest match.
Q: Its functions include inhibiting seed germination and halting transpiration in droughts. Mediating the plant's reaction during times of stress, it is found in the stem, root cap, and older leaves. FTP, name this plant hormone which, in contrast to auxins, promotes the falling, or abscission, of leaves before winter dormancy,
A:
Science