Humans benefit from the domestic dog because they reduce stress, they can prevent depression, and they can improve your health. Dogs benefit from humans because they love the bond they have with their owner.
To prevent cancer, over exposure to radiation
Answer:
The valence electrons have a role in the bonding of two atoms. The nuclei of each atom are drawn together by their attraction to the valence electrons of the other atom. As the atoms are drawn together by their attractions, electrons from each atom are drawn to the nuclei of both atoms, where they are "shared."
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A. Cell membrane would be the answer.
