I not sure but i think it is 4
Answer:
This barrier prevents the individuals on one side from reproducing with the individuals on the other.
Explanation:
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Answer:
Molars are the biggest of all the teeth. They have a large, flat surface with ridges that allow them to chew food and grind it up. Adults have 12 permanent molars — six on the bottom and top jaw, and children have eight primary molars.
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Answer:
1) is positive to negative end
2) is natural gas
Explanation:
