Since plants breath carbon dioxide, they will intake some C-14 as well and make it part of their tissue.Animals, in turn, eat plants or other animals that eat plants, receiving the C-14.After about 8 half-lives, the remaining amount of C-14 (if there is any remaining) is too small to be measured.
If one can measure the rate in which it decays, and the amount the organism started off with, then one might be able to figure out when the organism, such as a frog, croaked.
Misconception #2: Carbon dating can be used to date virtually anything Another misconception people have about carbon dating is that it can be used to date virtually anything.
Carbon dating can only be used to date objects that were once living or even apart of a living organism. It cannot be used to directly date inorganic objects, such as rocks (other radioactive dating methods are used to date radioactive rocks).
But, as C-14 continuously decays, it is also continuously being replaced by new C-14 being formed.
How carbon-14 enters an organism Most C-14 will combine with oxygen to produce radioactive carbon dioxide (C-14 O-2).