In living things, the source of the carbon-14 that is used in radiocarbon dating is carbon dioxide in the atmosphere.
Living things inhale oxygen, and exhale carbon dioxide into the atmosphere, which is why the air and atmosphere are so full of it.
Try putting this in biology category not chemistry so more ppl can help :)
Gray matter hope this helps!
Explanation:
The answer to questions are
A) 4
B) 3
C) 5
D) 3
E) 3
