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Name:  Mikhaila
Status:   student
Age:   14
Location: N/A
Country: N/A
Date: Around 1999  

Why do some flowers close up at night?

Flowers might close at night (when temperatures cool and humidity is higher) to protect the pollen from excessive moisture. Flowers are usually open when pollinators (insects, birds) are active during the day, but there are some night-opening flowers that are pollinated by night creatures such as moths and bats.

Anthony R. Brach, Ph.D.

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