False. Hydrogen is the most common gas in the universe.
written communication
It is true. Ozone is an allotrope of oxygen.
False
True
true, oxygen double bonds with itself
True, fire must have oxygen to burn.
It is TRUE that AEROBIC respiration requires oxygen to occur. It is FALSE that ANAEROBIC respiration requires oxygen to occur. It is FALSE that cells are DEPENDENT on AEROBIC respiration.
True
True
True
true
true