Final answer:
The Mesozoic era ended with significant consequences due to mass extinctions from a meteor impact and volcanic activity, resulting in the death of dinosaurs and the rise of mammals.
Step-by-step explanation:
The impact on the Mesozoic era, particularly during the end of the Cretaceous period, was immense and had lasting effects on life on Earth. Mass extinctions, including the notable demise of the dinosaurs, occurred due to a combination of a large meteor impact and significant volcanic activity. These events blocked sunlight and plunged Earth into darkness and cold, leading to the death of plant life and, subsequently, the starvation of herbivores and carnivores.
This period also saw the ascendancy of mammals and the evolution of new species, including pollinating insects, birds, and diversification in mammals. The shift in Earth's geography, such as the movement of continental plates, created new isolated ecosystems and niches for species to thrive. Despite the catastrophic events, life persisted and continued to evolve, demonstrating the resilience and adaptability of life on our planet.