Given a scientific question, generate a correct answer to it.

Q: What has traditionally been defined as a force of attraction between two masses?

A: gravity
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Q: What consists of four major components: inorganic mineral matter, organic matter, water and air, and living matter?

A: soil
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Q: In animal cells, what arises from the centrosomes and includes spindle microtubules and asters?

A:
the spindle
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