Scale (anatomy) Schultz's rule; Scur; Scute; Sexual dimorphism; Sexual mimicry; Skeleton; Skin; Snout; Spermatheca; Spongy tissue; Spur (zoology) Stifle joint; Stinger; Suture (anatomy) Symmetry in biology
The first officially sanctioned geographic and political limits associated with the Louisiana. Purchase were not laid down until the state of Louisiana was admitted to the union in 1812âthe. first state carved out of the Purchase as well as the first state west of the Mississippi.
1 Then a compromise developed: Maine could join as a free state to balance out Missouri joining as a slave state.  By 1820, the compromise had been realized. First, Missouri and Maine would be admitted to the Union, one as slave and one as free.