They form under a pressure and heat that doesn't destroy the fossils. Igneous and metamorphic rock form from molten rocks thus reaching a temp that destroys the fossils within.
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variations says it all...
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Sex cells are the only cells that undergo meiosis.
Explanation:
Sperm cells in male and egg cells in female are the sex cells because these cells are responsible for the formation of new organism. When the sperm sex cell fuse with egg sex cell forming zygote which turns into a new organism. Mitosis occurs in somatic cells while meiosis occurs only in sex cells.
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a gradual increase in the overall temperature of the earth's atmosphere generally attributed to the greenhouse effect caused by increased levels of carbon dioxide, chlorofluorocarbons, and other pollutants.
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