In which one of the following mass extinction periods trilobites becam...
The end-Permian extinction, which took place about 250 million years ago, is the most severe of five known mass extinction events. It killed off the last of the trilobites – a hardy marine species that had survived two previous mass extinction. While land plants survived, almost all forests disappeared.
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In which one of the following mass extinction periods trilobites becam...
The Extinction of Trilobites
Trilobites were marine arthropods that thrived during the Paleozoic Era, particularly from the Cambrian to the Permian periods. They are significant in understanding the evolution of life on Earth, but they faced severe challenges during major extinction events.
Mass Extinction Events
- The Permian mass extinction, occurring around 252 million years ago, is recognized as the most catastrophic event in Earth's history.
- It resulted in the loss of approximately 90-95% of marine species, including trilobites.
Impact of the Permian Extinction
- The environmental shifts during the Permian period involved drastic climate changes, ocean acidification, and significant volcanic activity.
- These conditions led to habitat destruction and diminished oxygen levels in oceans, severely impacting marine life.
Trilobites' Extinction
- Trilobites, being reliant on specific marine ecosystems, could not adapt quickly enough to the rapid changes.
- By the end of the Permian period, trilobites became extinct, marking the end of their 300-million-year existence.
Conclusion
- The correct answer to the question about the extinction of trilobites is option 'B' - Permian.
- This extinction event not only wiped out trilobites but also reshaped marine ecosystems, paving the way for the evolution of new species in the following Mesozoic Era.