Which process copies from dna onto mrna

Are these strong bases, neutral, strong acids, weak acids or weak base household bleach (ph=12.6) fluid in a car's battery (ph of less than 1.0) milk (ph=6.7) stomach contents (ph=2.2) pure water (ph=7)

Depending on the organism the number of in a cell may change

Explain how the number of similarities between the embryos from early stage to late stage is used as evidence of a common ancestry