Describe<span> the physical </span>properties of the Sun<span> (sunspot cycles, solar flares, prominences, layers of the </span>Sun<span>, coronal mass ejections, and nuclear reactions) and the impact of the </span>Sun<span> as the main source of external energy for the Earth</span>
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gene pool? species?
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Question is a bit vague hope this helped tho :(
Answer:
contraction and relaxation of the heart
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