Earth began as a mixture of about 90% stony, olivine-rich material and about 10% iron metal, just like the composition of chondritic meteorites. Soon after its formation the interior of the Earth is thought to have become very hot. What was the result of this increase in heat? A) The iron melted and collected in the interior of Earth to become its core. B) The olivine remained behind, becoming the mantle and the melted iron became the core. C) Both the olivine and iron melted and as they later solidified, became the mantle and the core. D) The olivine became the crust and the iron, melting, defended into the earth to become the core.
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The process of meiosis produces only gametes, eggs or sperm. according to the diagram, how many sperm are formed from each cell that undergoes meiosis?
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Will ! a cell containing a 3% sucrose solution is placed into a beaker containing a 7% sucrose solution. assume the cell’s membrane is permeable to water, but not permeable to the sucrose. where will the water diffuse? explain.
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Which of the following are responsible for sending messages from the hypothalamus to the thalamus?
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Earth began as a mixture of about 90% stony, olivine-rich material and about 10% iron metal, just li...
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