What are some applications of the field of spectroscopy? Check all that apply. O for identifying elements in a sample determining the distance and velocity of galaxies O for producing neon lights O for determining types of chemical bonds O for use in medical imaging devices O for killing bacteria in foods

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".

all matter is made up of atoms

in any element all atoms are the same

elements in a compound are always in a constant ratio: apex