If we follow a population through time and observe that allele frequencies change or genotypic frequencies change in this population, this may be because . a. the population size is small. b. mutations have occured c. selection is operating on the locus. d. Any of the other answers could be a possible reason.

Which of the following statements is true regarding a basic amino acid? a.) the hydrophilic r group of a basic amino acid will be located on the interior of a protein b.) the positively charged r group of a basic amino acid could bind dna c.) the r group of a basic amino acid would only be able to form covalent bonds with other molecules d.) a basic amino acid would be considered both polar and hydrophobic e.) all of the above