A.) The sewers cannot handle the volume of waste from street runoff...
If in an eight-cell embryo of an organism, the cells of the upper tier are aligned over the cells of the lower tier at a slight angle, it is likely that the organism is a vertebrate.
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It depends if it is a carrier or not, and if the trait is recessive or dominant trait
One is were you bang someone else to reproduce and the other is where you bang yourself to reproduce