Spindle fibers<span> form a protein structure that divides the genetic material in a cell. The </span>spindle<span> is necessary to equally divide the chromosomes in a parental cell into two daughter cells during both </span>mitosis<span> and meiosis. Spindle fibers are called mitotic spindle during mitosis.</span>
<span>Moving to the sun. Even trees that grow to the sunlight, phototropism, take advantage of movement. Without it, any time your "Home" becomes dark, you die.</span>
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Typically, the more massive the planet, the more massive the atmosphere it can acquire and maintain. This is important because the mass of a planet's atmosphere will directly influence its climate. The location of the “habitable zone” around a star will therefore be a function of the mass of the planet in question.
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