Vaccines contains 1 point
the antigen of a pathogen
the antibody of a pathogen
the DNA of a pathogen
the DNA of human cells

What links the two strands in a dna helix together in the middle? a. phosphate groups b. sugar rings bonded together c. proteins d. bases with hydrogen bonds

Describe how alleles and genes are related

Factors that can increase mutation rates a. high temps b. low temps c. food additives d. uv rays