Plz 50 points 1. the organisms that died off in the greatest mass extinction in earth history all died within days or weeks. true false 2. tetrapods are two-legged animals. true false 3. trilobites were shallow marine animals that flourished during the lower paleozoic. true false 4. paleontologists agree that the burgess shale fossils can all be classified into modern groups of organisms. true false 5. the cambrian saw a tremendous diversification in life forms in part because the extent of shallow seas opened up many marine habitats marine regressions opened up many habitats on land competition with the ediacara fauna caused rapid evolution of cambrian organisms all of these 6. simple plants lacking vascular tissue, like mosses, began to colonize land during the period. ordovician paleozoic mesozoic permian 7. the permian mass extinction, which occurred 250 million years ago, extinguished percent of marine species. 20 75 10 95 8. name the kind of animal groups which existed during the paleozoic era. amphibians invertebrates reptiles all of the above 9. the permian extinction is believed to have taken place in separate parts. 3 4 6 5 10. for land plants to flourish needed to evolve. flowers puddles of water insects seeds