Practice question
Question
Boysen-Jensen showed auxin to be a:
Explanation
Pick C: Diffusible chemical. Thinking through Auxin Phytohormone step by step rules out the lookalikes and leaves Diffusible chemical. Skip these: A) Protein signal; B) Volatile gas; D) Electrical signal. For hormones and genes, match the molecule or gene to its real role, not a neighboring pathway.