Answer: CO2 was the big driver of global warming at the end of the Ice Age." ... Comparing the global set of temperature records with the levels of CO2 in the ancient air bubbles trapped in ice cores reveals that global average temperatures started to rise at least a century after CO2 levels began to creep up
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I'm pretty sure it's a. With refrigeration you do have more food variety, the food lasts longer so less waste.
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chemical composition,cells, tissues,organs,organ systems,organism.
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Both prophase and telophase have a complete set of chromosomes and organelles.