Tornado. The other choices can take years upon years
Archea and Bacteria have prokaryotic cells, meaning their cells do not contain a membrane enclosed nucleus or other membrane enclosed organelles. The Eukarya ribosomal RNA (rRNA) sequence is unique and different from either the Archea or the Bacteria.
Sorry if this doesn't help :/
Answer:
Genetic variation can be caused by mutation random mating, random fertilization, and recombination between homologous chromosomes during meiosis
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