Is the study of heredity in organisms.

Radiometric dating is used to tell the absolute age of materials by studying the decay rate of radioactive isotopes. the decay rates of isotopes are constant and are expressed as .

Explain how sequences of amino acids in proteins can be used to reveal relationships among organisms.

Describe your dna model. which part do the straws represent? the pushpins? the paper clips and the black dots you made with the marker?