a shark and a snail
dimetrodon and edaphosaurus
dimetrodon was the dominANT SPECIES OF THE permian period
Adam And Eve
Metazoans were abundant during the Vendian Period.
dinosaurs
During the Jurassic Period, dominant organisms included dinosaurs such as Brachiosaurus, Stegosaurus, and Allosaurus. Other notable organisms included pterosaurs, marine reptiles like ichthyosaurs and plesiosaurs, and early mammals. The flora was dominated by conifers and ferns.
dinosaurs among animals on land and gymnosperms among plants
The living organisms that are dominant in a particular ecosystem depends on the ecosystem. In the rainforest for example, plants are the dominant organisms. In the desert, the animals are the dominant organisms.
dinosaurs among animals on land and gymnosperms among plants
During the Tertiary period, dominant organisms included early mammals, large birds, marine mammals like whales and dolphins, and diverse plant species. This period saw the rise of modern mammals, along with the evolution of grasslands, forests, and flowering plants. The Tertiary period also saw the decline of dinosaurs and the rise of more familiar animal groups.
155.92yrs
There are no non-living organisms, unless you mean dead organisms.