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The p wave of a normal electrocardiogram indicates
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Which of the following elements does soil need in the largest quantities to sustain plant life? a. copper b. iron c. nitrogen d. zinc
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Check all that apply diatoms are marine algae that have a shell made of silica, what are some of the uses of the silica shell after the diatoms die? 1.the shells make up the diatomaceous earth used in filters 2.it can be used as an ingredient in abrasives 3.they are used in food products 4.the shells can be used in some insulating materials
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Biology, 21.06.2019 23:30
During endocytosis, cells expel what they don't need take in what they need shrink due to loss of water
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Describe the response the kidneys have to dehydration and excessive water intake. what happens to the concentration of urine in each case ?
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The p wave of a normal electrocardiogram indicates...
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