Final answer:
Many organisms on the geologic time scale are now extinct. Extinction is a natural process that has occurred throughout Earth's history. Some well-known extinct organisms include the dinosaurs, woolly mammoths, saber-toothed cats, and dodo birds.
Step-by-step explanation:
The geologic time scale records numerous extinct organisms, and fossils provide evidence of these extinct species. One of the best-known mass extinctions occurred at the end of the Cretaceous period, about 65 million years ago, often referred to as the "great dying". This event led to the demise of most dinosaurs and many other species, marking a pivotal shift in the Earth's biological diversity.
Many organisms on the geologic time scale are now extinct. Extinction is a natural process that has occurred throughout Earth's history, and it is estimated that 99% of all species that have ever lived are now extinct. Some well-known extinct organisms include the dinosaurs, woolly mammoths, saber-toothed cats, and dodo birds. Extinction can occur due to various factors such as changes in the environment, competition with other species, or human activities.