James wants to estimate the absolute age of an animal fossil. However, test results show that the fossil doesn't contain any atoms of carbon-14.
What can James conclude about the lack of carbon-14?
I
OA. The animal, whether living or dead, never had carbon 14 in its system.
B. The animal's carbon-14 decayed long before the animal died.
C.
Finding another fossil nearby without carbon-14 will guarantee that he has matching fossils.
D.
Without carbon-14, it will be an impossible task to estimate the age of the fossil.
E. Without carbon-14, James can use relative dating to estimate the age of the fossil.

answer:

First choice: It is important to know that all animals have carbon-14. Carbon 14 is in the air in carbon dioxide molecules, which animals produce through cellular respiration. Therefore, there is always a small amount of carbon-14 in animals because it is in the food chain. Incorrect.

Second choice: Again, like the above - there will always be a small amount of carbon-14 in animals. Incorrect.

Third choice: It is not guaranteed. Finding another fossil nearby only can say that they lived together, not that they are matching fossils. Incorrect.

Fourth choice: It is not impossible to estimate the age of the fossil. Incorrect. Therefore, that brings us to the correct answer...

Fifth choice: Correct. Relative dating, while it will not give an exact age, can estimate the age of the fossil. James could take a look at the relative order of past events and estimate the age of the fossil that way.

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