Which best explains the evolution of gymnosperm plants
A. They evolved along with monocots and dicots
B. They evolved after the seeded flowering plants
C. They evolved after the seedless vascular plants
D. They evolved before the seedless non vascular plants

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

in 1859, charles darwin set out his theory of evolution by natural selection as an explanation for adaptation and speciation. he defined natural selection as the "principle by which each slight variation [of a trait], if useful, is preserved".