According to Chargaff's rule, base pairing in DNA should resemble which of the following? A = T; C = G
A = C; T = G
A = G; T = U
A = U; C = G

drfgt dfs f grftsrh fg rts gh   htr hr rs t

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

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.