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The probable reason for the case would be that the sea floor 200 million years ago is now above the sea level.
The ocean floor is the eventual recycling center. While the Earth's continental crust can prevail for billions of years, the movement of tectonic plates results in subduction, that is when the crust of the ocean is pushed down into the present mantle. So, the ocean floor hardly endures longer than 200 million years.
Answer:
it should go in this order (starting and going from left to right) [see explanation]
Explanation:
carbon dioxide and water are your reactants
sunlight should go in the blue box
glucose and oxygen are your products
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The population increases due to the fact that birthrate becomes higher than the death rate.
Answer: Calcitonin causes extracellular Ca2+ levels to decrease.
Explanation:
