Penumbra,<span> the Moon's faint outer shadow. Partial solar eclipses are visible from within the penumbral shadow.</span> And Umbra,<span> the Moon's dark inner shadow.<span> Total solar eclipses are visible from within the umbral shadow</span></span>
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B. Spindle fibers begin to form.
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People cannot travel more than a few miles beneath Earth's surface because of the intense heat and pressure.
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Adenine 2) Thymine 3) Cytosine 4) Guanine
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