Which radioisotope would be used by both archaeologists and botanists (scientists who study plants)?

Carbon-14 is used to estimate the age of once-living materials, including wood, seeds, and other plant remains. Archaeologists use it to date artifacts or sites containing organic material, while botanists can use it to study plants. Therefore, carbon-14 is the radioisotope used by both.

AI-written and checked against the verified answer.