Question

Are oxygen 16 and oxygen 18 isotopes stable or unstable (as relates to how they are evaluated for determining whether extinct whales likely inhabited freshwater or saltwater)? Which economic thinker, who specifically influenced Darwin, proposed how populations were limited by a finite supply of available resources? Which event occurred first? The Great Oxygenation Event, the first fully terrestrial (land) animal (millipede-like), or the mass extinction of dinosaurs.

Answer 1

Section C #1. Are oxygen 16 and oxygen 18 isotopes stable or unstable (as relates to how they are evaluated for determining whether extinct whales likely inhabited freshwater or saltwater)? Oxygen contains approximately 15 isotopes of which Oxygen-16, Oxygen-17, and Oxygen-18 are stable. These stable isotopes of oxygen are used as indicators of specific habitats (such as fresh water and salt water).