which phrase describes the element carbon - 14? decays at an unknown rate found in an organisms remains…

which phrase describes the element carbon - 14? decays at an unknown rate found in an organisms remains forms from the breakdown of nitrogen - 14 is measured to determine the age of sedimentary rocks

which phrase describes the element carbon - 14? decays at an unknown rate found in an organisms remains forms from the breakdown of nitrogen - 14 is measured to determine the age of sedimentary rocks

Answer

Brief Explanations:

Carbon - 14 is a radioactive isotope. It is present in living organisms and remains in their remains after death. Its decay rate is known (half - life of about 5730 years), it forms from the interaction of cosmic rays with nitrogen - 14 in the atmosphere, not from the breakdown of nitrogen - 14 in the way stated, and it is used for dating organic materials, not sedimentary rocks.

Answer:

found in an organism's remains