With respect to complementarity of structure and function, e…

With respect to complementarity of structure and function, explain why simple columnar epithelial tissue can secrete and absorb but stratified columnar can only secrete.  Your answer must  describe specific structure features of the tissue and related them to function.   Answers must be in complete sentences and follow the rules of grammar.

When two aqueous solutions of barium chloride (BaCl2) and co…

When two aqueous solutions of barium chloride (BaCl2) and copper sulfate (CuSO4) are combined, insoluble barium sulfate (BaSO4) forms leaving copper chloride (CuCl2) in solution. What type of reaction is this? BaCl2 (aq) + CuSO4 (aq)     →   BaSO4 (S) + CuCl2 (aq)