Carbon 14 isotope is used to determine the age of dead plants like fossils and animals and stones etc. The age determination of very old objects based on carbon 14 isotope is called carbon dating.
I think its A but it has been a while since i did this.
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B: It occurs only in cells in the reproductive structures of organisms.
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Every nation has its own natural resourse that has abundant and theres other that lack so the countries will trade they abundant for the ones they dont have.
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Answer: observation, question, hypothesis, prediction, experiment, results, conclusion.
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