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4 answers

Mostly its for pollination purposes. Tulips are typically pollinated by bees and other day-loving insects. Morning glories are also like this. On a cloudy day, morning glories might barely open up or they might last into the next day, which is really unusual for an otherwise sunny day-loving flower.

2006-08-16 03:49:21 · answer #1 · answered by Anonymous · 0 0

just a certain type of flower...morning glories do the same

2006-08-16 03:12:22 · answer #2 · answered by somebody 3 · 0 0

They open their "treasures" to the bees and other pollinators.

2006-08-16 03:10:47 · answer #3 · answered by ed 7 · 0 0

Because that is how God made them.

2006-08-16 03:19:38 · answer #4 · answered by Anonymous · 0 0

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