Answer:
B. Their predators have been killed by the Cretaceous-Paleogene extinction
Explanation:
The mammals and the avian dinosaurs were small creatures, living in the shadows of the dinosaurs which dominated the world, but also were stopping the further increase in size and development of these animals. At the end of the Cretaceous though, an asteroid struck the Earth. The impact was so hard and devastating that it managed to destroy the dinosaurs and wipe them out of the face of the Earth, with the only dinosaurs remaining being the small avian species. Since lots of niches opened up and where free for taking in the ecosystem, the mammals and the avian dinosaurs quickly started to evolve, diversify, and become much larger. The mammals seem to won the race for dominance as they have become the most dominant species on the planet.
Answer:
Comunidad de flora y fauna que ocupa un hábitat importante.
Explicación:
El bioma se define como una gran comunidad natural de flora y fauna que ocupa un hábitat importante como el bosque o la tundra, etc. Las plantas y los animales que viven en un bioma tienen características y adaptaciones comunes para el medio ambiente. Hay siete biomas presentes en la tierra, es decir, tundra, matorrales, bosques lluviosos, pastizales, desiertos, bosques caducifolios templados y bosques de coníferas. Hay cinco tipos principales de biomas: acuático, pastizal, bosque, desierto y tundra. Las plantas y los animales presentes en cada bioma se adaptan a ese bioma.
Answer:
D. intense volcanic activity.
Explanation:
- The Paleozoic era an era in the geologic time and started about 541 million years. It originated due to the diversity of life forms on the planet. and ended about 252 mn years ago along with the end of Permian era.
- The extinction was related to the changes in climate and exceptionally low sea levels. During which about 95% of the marine species were killed.
