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Adaptive Radiation

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Past mass extinctions most likely occurred as a result what?

Sudden changes in environmental conditions.


What was the outcomes of each of the mass extinctions?

The outcomes of each of the mass extinctions is that animal and/or bacteria die.


Mass extinctions are usually followed by what?

Mass extinctions are usually followed by a period of rapid diversification as surviving species adapt to new environmental conditions and fill ecological niches left vacant by extinct species. This diversification can lead to the emergence of new species and ecosystems over time.


Do scientists believe that extinctions are uncommon?

No, they are fundamental to the process of evolution. Mass extinctions are less common.


Is Earth is in danger of another mass extinction?

Mass extinctions occur when the conditions on Earth change faster than species can adapt. Since humans have greatly changed the conditions on Earth and continue to change them at rapid rates, a mass extinction is a likely possibility if nothing is done to reverse or stop the changes (mainly the amount of carbon dioxide being released to the atmosphere). Another common cause of mass extinctions are extraterrestrial which cannot be predicted and are somewhat spontaneous.


What has happened during mass extinctions?

Bad things


Why mass extinctions occur and why they often mark divisions of geologic times?

Mass extinctions occur when extreme temperatures happen.https://science.howstuffworks.com/life/evolution/extinction3.htm


Why do we think most extinctions occur as background extinctions?

Most extinctions are believed to occur as background extinctions because they result from gradual changes in environmental conditions, competition, and ecological shifts rather than catastrophic events. These slow processes allow species to gradually decline over time due to factors like habitat loss, climate change, and resource depletion. Background extinctions typically reflect the normal turnover of species, where weaker or less adaptable organisms are outcompeted or unable to survive in changing conditions. This contrasts with mass extinctions, which are sudden and dramatic, affecting a wide range of species simultaneously.


Why do you think most extinction's occur as background extinctions?

Most extinctions occur as background extinctions because they are longer time periods unlike the shorter mass extinctions which there were only two in the Paleozoic era, the Ordovician mass extinction, and the Permian/Triassic extinction in which 95% of all marine animals became extinct


What has changed most of the mass extinctions on earth?

climate change


The fossil record indicates that Earth has experienced?

5 mass extinctions


What have Mass extinctions determined?

order in which fossils are found in the fossil record.