Which is the best example of organisms that have been naturally selected

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)

Complete the possible outcomes for each generation in the pedigree chartaa aa aa

Which codon is the code for the amino acid histidine (his)?