Answer:
They are composed of molecules that contain carbon-carbon bonds.
They undergo chemical reactions to use energy they acquire from the environment.
Living things are organisms that displays characteristics of life. These characteristics includes the ability to grow, reproduce, use of energy, excrete out waste, respond to the environment and have organised structure.
the . answer to this question is b They had food sources that were low to the ground
Answer:
Scientists found evidence such as fossils that were almost 4 billion years old, concluding that life on earth began after that.
Explanation:
