Because asexual reproduction is much more efficient in many ways, the question of why sexual reproduction evolved as a reproductive mechanism is of considerable interest to biologists. Given that the vast number of multicellular organisms can reproduce sexually, what conclusion can be drawn from its existence

the electromagnetic spectrum includes, from longest wavelength to shortest: radio waves, microwaves, infrared, optical, ultraviolet, x-rays, and gamma-rays.

one part of the electromagnetic spectrum that arrives on earth as solar radiation from the sun is the visible spectrum. wavelengths of the visible spectrum combine to form what we refer to as

answer - d) ultraviolet radiation.

violet /   380–450 nm / 668–789 thz

violet is number 1 in the chart of visible light.