Cold case detectives are investigating a homicide that took place 30 years ago. in reexamining the evidence, they find a tiny spot of blood on the victim’s clothing that was likely left by the murderer. the dna in the blood has partially degraded over time. what technique would the blood lab technicians use in their examination of this tiny, degraded blood sample

explanation:

for  example, forests have higher evapotranspiration than other ecosystems,  such  as grasslands, because of their deeper roots and greater leaf area. thus forests have a net moistening effect on the atmosphere and become a moisture source for downwind ecosystems.

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).