In plant seeds that germinate in response to a brief pulse of light, _______ is most effective in triggering germination.
A) green light
B) far-red light
C) red light
D) the initiation of photosynthesis
E) red light followed by far-red light

Question

Quizplus · Accepted Answer

This phenomenon is known as the red/far-red reversible response and is controlled by the phytochrome photoreceptor. Red light (660nm) activates the phytochrome, which induces germination, while far-red light (730nm) inactivates the phytochrome, which prevents germination. Therefore, the most effective way to trigger germination in these types of seeds is to expose them to red light followed by far-red light.

In Plant Seeds That Germinate in Response to a Brief