Aveterinarian diagnoses a dog with rabies. rabies is a viral disease in which the virus spreads through the spinal cord and nerves of an animal. which body system does rabies affect?
a.
nervous
b.
circulatory
c.
respiratory
d.
digestive
e.
endocrine

Nervous

Explanation:

The nervous system is made of the brain, nerves and spinal cords

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).