Answer:
The biological levels of organization of living things arranged from the simplest to most complex are organelle, cells, tissues, organs, organ systems, organisms, populations, communities, ecosystems, and biosphere.
Explanation:
I found the answer on the internet :)
Answer:
D I guess because grinding optical glass and for polishing metals and has also been made into sandpapers and grinding wheels.
Penicillin was an accidental discovery I believe