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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oye no me lo de baja enviar y me tocó tomarle pantallazo de lo que estaba escribiendo y espero te ayude
1.producers
2.Primary consumers
3.secondary consumers
4.tertiary consumers
Chest compressions are meant to continue the circular of blood through the body so none of the ads answers are explicitly correct but A pump the heart is the most accurate I can vouch for