In the past 100 million years, the number of species of which group of plants has been increasing?

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The group of plants that has experienced the greatest increase in species diversity over the past 100 million years is angiosperms, or flowering plants. This is due in part to their ability to co-evolve with insects, which has allowed for more efficient pollination and greater diversification. Additionally, angiosperms have evolved a wide range of specialized structures for dispersing their seeds, which has also contributed to their success. While gymnosperms, such as conifers and cycads, were dominant in the Mesozoic era, they have not experienced the same level of diversification as angiosperms in the past 100 million years.

In the Past 100 Million Years, the Number of Species