Answer:
Step-by-step explanation:
Over the course of the past 2 million years, the Earth's plant life has undergone significant changes. During this time period, many plant species went extinct, likely due to a combination of factors such as climate change, disease, and human activity. The most notable extinction event occurred during the Cretaceous period, where a significant portion of plant species went extinct. This was likely due to a massive asteroid impact that caused widespread destruction and altered the planet's climate.However, it's not all doom and gloom, as there have also been instances of recovery and diversification in plant life throughout the millions of years. For example, after the mass extinction event of the Cretaceous period, new plant species evolved and diversified to fill the ecological niches left behind by the extinct species. This process of speciation and adaptation has led to the diverse array of plant life we see on Earth today.In summary, plants have gone through a complex history of extinction, recovery, and diversification over the course of the past 2 million years. The most notable extinction event occurred during the Cretaceous period, but new species have evolved and adapted over the millions of years, leading to the diverse array of plant life we see today.