Angiosperms contain how many phototropin genes?
Pick B: Two. Thinking through Phototropin+All step by step rules out the lookalikes and leaves Two. Skip these: A) One; C) Three; D) Four. For hormones and genes, match the molecule or gene to its real role, not a neighboring pathway.
Ref: Best CSIR NET Plant Physiology books: Master Unit 6 with Taiz & Zeiger and Salisbury & Ross. Crack Part C experimental questions with top textbooks.