FACTANSWER
A

Q: Why is the sky blue, blood red and the trees green?

- 1 Answers
this my question: why is the sky blue, blood red and the trees green?, could members answer me please
general
L
Human eyes chose at some point of evolution to detect three colours. And those colours were chosen for their importance and abundance, and the chances those colours gave them to differentiate visually things in their environment:
* Blood. It's main component, hemoglobin, lets out a red wavelenght. Blood was important to see right away, and its light comes out from many animal skins also. Hemoglobin is the main oxygen transport molecule for most animal species.
* Chlorophyl. Is essential for plant food production, and is the background colour of many sights humans (or apes) would encounter in their environments. So it was good to see that colour to sort out any other thing in front or behind leaves, that would most probably not be green.
* Sky. Air scatters blue sunlight. The rest of the light is transmitted through the sky, and so comes down only in line with the sun, where as blue light is scattered throughout the sky and appears to come from all directions (though brightest near the sun). The blue sky would also be a frequent background, and like wise green, it would be an advantage to single out other things against a blue sky background. ...

Do you know the Answer Please Sign-in Or register in order Answer this question?

6 Other Questions:
Suggested Answer  · 3 votes
DNA is often referred to as nucleic ACID. Why does it have an acidic nature?? The phosphoric acid group is present but even a base is linked to it. stil it remains acidic, how??????... more
Suggested Answer  · 2 votes
... supporting cruelty to animals and on GoVeg.com, I heard the meat can make people sick.Improperly stored or improperly prepared meat can cause illness, but meat itself is very good for you. Loaded with energy and protein, ounce for ounce meat provide... more
Suggested Answer  · 28 votes
...s not a scientifically correct term. The things I want to pin down are those worm like shapes, floating in your field of view when unfocused. When you try to focus them, they move away. One explanation, I once heard is, that those are dust particles ... more
Suggested Answer  · 10 votes
...rays hit the earth's atmosphere, where the light is scattered by nitrogen and oxygen molecules in the air. The blue wavelength of this light is affect... more
Suggested Answer  · 1 votes
You have a severe lack of imagination.... more
Suggested Answer  · 2 votes
...en on November 19, 1863 at Gettysburg, Pennsylvsnia.President Lincoln was the special guest of David Wills, the 32 year old lawyer whose house faced t... more