Which type of the stem cell has the ability to form the most different types of cells and structures?

What is the meaning of the arrow in the following chemical equation?

Which statement below correctly represents an example of complementarity of structure and function at the level of a single cell?

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.

Which of these figures illustrate chemical reactions? ​

_____ refers to a cell that resembles a star 

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)

Which of the following transformations is a chemical reaction?

For the following question(s), consider the following balanced equation. Mg3N2 + 6H2O → 3Mg(OH)2 + 2NH3 When 7.58 moles of Mg3N2 are allowed to react, how many moles of H2O also react?

Which of the following equations is used to convert 91.0 milligrams of urea (CH4N2O) to moles of urea?