Practice question

The right choice is B: Negative regulators of photomorphogenesis. In PHYTOCHROME, that matches how the process or concept actually works — the other choices mix up related ideas or use the wrong mechanism. Skip these: A) Positive regulators of photomorphogenesis; C) Photoreceptors; D) Hormones. A quick check: if an option needs energy, pumps, or the opposite direction of movement, ask whether that really applies.