Which substances are needed for cellular respiration? use complete sentences to explain how the mass of hydrogen is conserved during cellular respiration.

carbon dioxide and oxygen and water and glucose and hydrogen

answerleaving cheese out to get moldy;

answer is: nuclear fusion produces elements that are heavier than helium.

nuclei combine to form a heavier nucleus, releasing energy.  

for example, fusion of hydrogen atoms at the sun.  

this fusion nuclear reaction is in the inner core of the sun and hydrogen (atomic number 1) is conveted into helium (atomic number 2).  

the inner core is the central region of the sun and all solar energy is produced in the core by nuclear fusion.