Apiece of virus dna that becomes a part of a bacterium's genome is called a
a) prophage
b) bacteriophage
c) endospore
d) retrovirus

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).

the answer is a) cell division.

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