An ecosystem is like a machine that cycles matter by using: captured energy.
Hope this helps (:
I don't have the story please put it in the comments so I can read it :)
B. Pine trees, this is the answer that was right after I took the test XD
Answer:
Similarly to their eukaryotic counterparts, bacterial chromosomes perform the complex task of efficiently compacting DNA while supporting gene regulation and proper DNA segregation. Chromosomes are thus shaped at multiple scales by a large number of proteins and DNA enzymes