#11.) Phacops. It lived in the late Devonian Period (~400 million years ago).
#12.) Carbon-14 is a good radioactive isotope for determing the age of artifacts from a burial site thought to be associated with the most recent early humans because it is present in all organic matter (which humans have, of course).
#13.) 3, Devonian.
#14.) From the Devonian Period through the Triassic Period.
#15.) Cenozoic.
I think one is carbon dioxide not sure what the other is
Show a difference from wild plants and animals
Answer: <u><em> actually (d) none of the above</em></u>
Answer:
I'm pretty sure it is organ
