The sudden disappearance of plants and animals that occupy a specific habitat creates new opportunities for surviving species. Inferring the mammal tree: Species-level sets of phylogenies for questions in ecology, evolution, and conservation. Tree adapted from Upham, N.S., Esselstyn, J.A., Jetz, W., 2019. But mass extinction can also play a creative role in evolution, stimulating the growth of other branches. In this way, mass extinction prunes whole branches off the tree of life. Information on controversies in the public arena relating to evolutionĪt the most basic level, mass extinctions reduce diversity by killing off specific lineages, and with them, any descendent species they might have given rise to.Alignment with the Next Generation Science Standards.The big issues – Pacing, diversity, complexity, and trends.Macroevolution – Evolution above the species level.Microevolution – Evolution within a population.Mechanisms: the processes of evolution – Selection, mutation, migration, and more.The history of life: looking at the patterns – Change over time and shared ancestors.An introduction to evolution: what is evolution and how does it work?.
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