In order to "invest" in later stages to get more energy per glucose molecule. It could also be because that is how it is done, it wouldn't be as efficient unless these stages were performed.
hope this helps!
<span>Living things are made of cells.Living things obtain and use energy.Living things grow and develop.Living things reproduce.Living things respond to their environment.<span>Living things adapt to their environment.</span></span>
Answer:
sea floor spreading occurs at mid ocean ridges
