Type i hypersensitivities require which of the following initial priming events to occur?
sensitization
secondary immune response
cellular trauma
degranulation

What type of pollution does household garbage cause

Which of the following statements is true about the relationship between genetic variation and natural selection? a. genetic variation must be present in a population before natural selection can act on it. b. genetic variation arises in a population as a result of natural selection. c. natural selection can act on a population whether there is genetic variation within the population or not. d. after natural selection acts on a population, the amount of genetic variation in the population always increases.

What problem would a person most likely have if her kidney did not work correctly?