Why do seeds need darkness to sprout?
Show answer & explanation
Answer: Darkness signals soil depth
Darkness provides energy — Wrong. Darkness provides no energy. Seeds use stored energy regardless of light conditions.
Darkness signals soil depth ✓ — Correct! Many seeds use darkness as a signal they're buried deep enough for safe growth. Light-requiring seeds won't sprout if buried too deep. This adaptation prevents wasted energy sprouting in poor conditions. Not all seeds need darkness though!
Seeds sleep in darkness — Wrong. Seeds don't sleep. They're metabolically inactive until conditions trigger germination.