Identify the reagents represented by the letters in the above reaction scheme. (enter your answer as a string of letters without punctuation, e. g. abcd.)

What does the process of natural selection involve

An atom of sodium-23 (atomic number = 11) has a positive charge of +1. give this information, how many electrons does it have? how many proteins and neutrons does this atom have

What is the correct equation for cellular respiration?