<span> </span> <span>Mining is considered the dangerous job in the United States.
Hope this helps!</span>
Scientists<span> are working on ways to </span>make embryonic<span> stem </span>cells<span> without destroying </span>embryos<span> and to </span>make cells<span> that </span>behave like embryonic<span> stem </span><span>cells
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Right amount of water is the secret.
<span>The individuals with extreme variations of a trait.</span>
