Task: Text Categorization
Input (English): This molecule exerts its effects by binding to its eponymous transmembrane protein receptor, which inactivates CTR1 to initiate a signal cascade, resulting in EIN3 turning on relevant gene expression. Silver salts inhibit its actions by binding its receptor, and it is responsible for the formation of the apical hook of many eudicot seedlings. Sometimes called the "senescence hormone," it promotes stem swelling but inhibits stem elongation, but is best known for its promotion of leaf abscission and fruit ripening. FTP, name this plant hormone, a simple gaseous molecule with formula C2H4.
Output (English): Science