Copper sulfate and sodium hydroxide indicates the presence of a positive result will change color to
fill in the blanks

answer: blah

explanation:

bc blah

genetic variation can be caused by mutation (which can create entirely new alleles in a population), random mating, random fertilization, and recombination between homologous chromosomes during meiosis (which reshuffles alleles within an organism's offspring).

answer; /// the shaft of the hair consists of dead cells;