We define chemical reaction is a process in which old bonds break and new bonds are formed . So from the definition you can get the result easily
Their source of carbon. Autotrophs obtain their carbon from inorganic sources such as from atmospheric carbon dioxide. Examples of autotrophs include plants, and euglena ( a protist).
Heterotrophs on the other hand, obtain their carbon from organic sources such as other organisms. Examples of heterotrophs include all secondary consumers, and decomposers.
Well DNA is the blueprint for a person's body and tells the RNA what to do, so I guess it plays many roles... the transfer of DNA determines what a person (baby) will end up looking like once it he/she exits the womb
Causes an explosion that sends the rocket upwards
