Answer:
Positive and negative ions
Explanation:
when these two come together it is considered ionic bonding.
It is heat, convection cells in the asthenosphere cause the movement of the crust.
Answer:
What causes genetic variation?
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).
Explanation:
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