I think it's single replacement reaction.
It is true, here is evidence to this question "<u>People are heterotrophs</u>: we eat plants or meat to stay alive. You might say, well, isn't everything a heterotroph? A lot of creatures are, including giraffes, dogs, fish, <em>horses </em>" I hope this helps you with what your doing.
The 3 domains are archaea, bacteria, and eukaryote. It is a biological classification.
Answer:
Heredity and DNA is the answer