What is the name of the outermost layer that forms a boundary around the outside of each cell?

Which of the following statements is true of enzymes? a)they dont provide an active site for substrates to bind in a reaction b)they act on a specific type of substrate in a reaction c)they unusable after a reaction d)they change shape after a reaction

Mineral rich water heated by newly found oceanic crust escapes through cracks in the ocean floor called

Why does miranda have that particular vision of dr hildesheim answer?