A vestigial trait A) is caused by inactive genes

B) is a sign of an intermediate form

C) no longer appears in the genetic code of an organism

D) no longer performs the function for which it originally evolved

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

mammal

explanation:

the sugar-phosphate backbone forms the structural framework of nucleic acids, including dna and rna. this backbone is composed of alternating sugar and phosphate groups, and defines directionality of the molecule.