Which of the following is not part of the structure of an antibody?

a.) a hypervariable region
b.) an antigen-binding site
c.) light chains
d.) heavy chains
e.) a major histocompatibility complex

Which statement describes how favorable traits in a population relate to natural selection? they are the only traits that ever exist in the population. they build in the population over time. they are rarely passed on to offspring. they are found only in a few individuals within the population.