The analysis of DNA sequences from different organisms is used in the production of molecular clocks - Scottish Highers Biology - Question 20 - 2018

Molecular clocks are built on the premise that mutations in DNA sequences accumulate at a relatively constant rate over time. This allows scientists to estimate the time of divergence between different species based on the number of mutations observed in their DNA. While individual mutations can happen randomly or spontaneously, the concept of 'molecular clocks' specifically relies on the assumption that these changes accumulate predictably over time, hence the answer is D.