Which of the following is not true about mutations? a) mutations are chance changes in the dna sequence of bases and may code for a different amino acid b) mutations may cause variations that are adaptations c) radiation and x-rays may cause mutations d) mutations are always harmful

It is D , because all mutations cannot and will not be harmful.

carbohydrates: (starches and sugars) composed of carbon, hydrogen, and oxygen.

lipids: (fats, oils, and waxes) are made of carbon and hydrogen atoms.

nucleic acids: contain hydrogen, oxygen, nitrogen, carbon, and phosphorus. they are polymers of nucleotides. a nucleotide has three parts, a 5-carbon sugar, a phosphate     (-po⬇️4) group, and a nitrogenous base.

proteins: made up of nitrogen, carbon, hydrogen, and oxygen. they are polymers of amino acids.