Answers

2014-09-21T17:02:56+05:30
It is because there is no presence of sunlight so chlorophyll is absent and so the flowers are colourless.
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2014-09-21T17:03:53+05:30
They are colorless, in order to reflect the moonlight and advertise their beauty to passing moths or other insects. Sphinx Moths are the primary pollinators of night blooming flowers.
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