Which two characteristics of living things do viruses exhibit

The use of dna as evidence in criminal investigations became possible because of the

What does the hardy-weinberg principle relate to? a. chances of survival of an organism b. frequency of alleles in a population c. natural selection in a species d. causes of evolution among organisms

Which of these substances does not protect against invaders in the nonspecific immune response? a. saliva b. mucus c. tears d. urine