In a recent research it has been discovered that plants have developed to project a lsquo Blue Halo ...........

Environment and Ecology Air Pollution

In a recent research it has been discovered that plants have developed to project a ‘Blue Halo’ from their flowers. Which of the following statements are correct regarding the ‘Blue Halo’?

1. Only blue flowers can project the blue halo.

2. The halo is invisible to human eye but visible to insects.

3. The Halo helps in luring the pollinating bees and insects.

Select the correct code from below.

1 and 2 Only

2 and 3 Only

1 and 3 Only

All of the above

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Explanation:

Blue Halo :
Hundreds of flower species have evolved the ability to project ethereal halos of blue light invisible to humans in order to lure pollinating bees.
In laboratory experiments, bumblebees were drawn to synthetic flowers designed to generate the same kind of ultraviolent rings.
The effect occurs in the ultraviolent part of the optical spectrum that we cannot see, but bees can.
Previous studies have shown that bees in search of nectar-giving plants are attracted to odours, but take most of their cues from colours and petal shapes.Bees are especially sensitive to the band of colours on the light spectrum where blue graduates into ultraviolent.

Process :
Many flowers lack the genetic and biochemical capability to manipulate pigment chemistry into the blue-to-ultraviolent spectrum.
So arranging the molecules in petals so that reflected sunlight will produce a blue halo emerged as an alternative evolutionary strategy to attract pollinators.
Remarkably, otherwise divergent species wound up with the same lure.
Findings suggest the petal ridges that produce ‘blue halos’ evolved many times across different flower lineages, all converging on this optical signal for pollinators.