Which best describes radiometric dating? a: measures the amount of radioactive materials in a sample. b: measures the breakdown of radioactive materials in a sample. c: measures the accumulation of radiometric materials in a sample. d: measures radiometrics.

The answer is; B

Rocks have naturally occurring and spontaneously radioactive atoms in them, such as carbon-14. These element isotopes decay into other types of atoms over millions of years. Therefore, by measuring the amount of these radiometric substances, and knowing the half-life of the isotopes, it is possible to postulate the age of a rock to within certain ranges of error.

it's     c       this is a cell (b) with a nucleus (c) containing dna (a). the dna is organized into chromosomes (d). a section of the chromosome that codes for a trait is called a gene (e).