Answer:
The osmolarity of mammalian urine may vary over time. The osmolarity of mammalian urine varies little between species. Mammalian urine is always hyperosmotic to blood. The osmolarity of mammalian urine may vary over time.
Explanation:
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D. Density increases is the correct answer!
Anton Von Leeuwenhoek verified Robert Hooke's discovery of cells.