Bailey's essay was returned for punctuation errors. which of the following is the correct way for bailey to punctuation the sentence

This is an active transport mechanism by which cells pump sodium and potassium ions against the concentration gradient

Which plate boundary causes plates to collide forming mountain ranges, volcanoes, and island arcs? give an example of this type of plate boundary. 2. at which plate boundary do rifts and mid-oceans ridges form? give an example of this type of plate boundary. 3. at which plate boundary do plates slide past each other while moving in opposite directions? give an example of this type of boundary.

Why are some places regularly warmer or cooler than others in a given month