Practice question
Question
Shade avoidance responses are triggered when the R:FR ratio is:
Explanation
Go with C — Low. Under PHYTOCHROME, this is the standard explanation you’d use in class: it names the real driver or definition, while the rest are nearby but wrong. Not these: A) High; B) Unchanged; D) Zero. When two options sound similar, choose the one that matches the textbook definition most tightly.
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