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What organisms were affected the most?
The organisms that were affected the most by the mass extinction events in Earth's history were typically those that were less adaptable or specialized, such as large dinosaurs or marine organisms with specific environmental requirements. These events caused widespread extinctions and disruptions to ecosystems, leading to a significant loss of biodiversity.
What important function did rudists perform during the cretaceous?
During the Cretaceous period, rudists played a crucial role in marine ecosystems as reef builders, similar to modern corals. These bivalve mollusks formed extensive reef structures in shallow seas, providing habitat and shelter for various marine organisms. Their unique adaptations allowed them to thrive in diverse environments, contributing significantly to the biodiversity of Cretaceous marine life. The decline of rudists at the end of the Cretaceous marked a significant shift in reef-building dynamics, paving the way for modern coral reefs.
How does greenhouse effect the organisms that live in the ecosystems?
The greenhouse effect can impact organisms in ecosystems by increasing temperatures, altering precipitation patterns, and changing habitats. Some organisms may struggle to adapt to these changes, leading to shifts in species distribution, disruptions to food webs, and potential extinctions. Overall, the greenhouse effect can pose significant challenges to the survival and well-being of many species in ecosystems.
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.
The deadliest of all mass extinctions which killed 95 percent of all living organisms was the?
Permian-Triassic extinction event, also known as the Great Dying, which occurred around 252 million years ago. It was the deadliest of all mass extinctions, wiping out around 95% of all species on Earth and leading to significant ecological changes. The event was likely caused by a combination of volcanic activity, global warming, and ocean acidification.
How many extinctions has earth experienced in its history?
Mass extinctions--at least two--one at the end of the Permian, and one at the end of the Cretaceous, with numerous other less severe events. As far as the extinction of individual species, that list would cover millions of extinct organisms.
The end-cretaceous extinctions were followed by the . a. adaptive radiation of mammals and birds b. appearance of hard-shelled marine organisms c. appearance of first land plants d. insects?
The answer is a.
What were the dominant organisms during the Cretaceous period?
My cousin lenny
What were the dominant organisms living at the time of cretaceous period?
dinosaurs
Did organisms live before Cretaceous Tertiary?
Yes, many.
Where did most of the organisms live in the cretaceous period?
Unsure by many of the organisms were wiped out but probably Asia
What organisms were affected the most?
The organisms that were affected the most by the mass extinction events in Earth's history were typically those that were less adaptable or specialized, such as large dinosaurs or marine organisms with specific environmental requirements. These events caused widespread extinctions and disruptions to ecosystems, leading to a significant loss of biodiversity.
What were dominant organisms living in the Cretaceous?
dinosaurs among animals on land and gymnosperms among plants
What were the dominant organisms living in Cretaceous time?
dinosaurs among animals on land and gymnosperms among plants
What is Cretaceous Limestone?
Cretaceous limestone is a type of sedimentary rock formed during the Cretaceous period, approximately 145 to 66 million years ago. It is made up of predominantly calcium carbonate minerals derived from the remains of marine organisms such as corals, shells, and algae. Cretaceous limestone is often used as a building material and in the production of cement.
What important function did rudists perform during the cretaceous?
During the Cretaceous period, rudists played a crucial role in marine ecosystems as reef builders, similar to modern corals. These bivalve mollusks formed extensive reef structures in shallow seas, providing habitat and shelter for various marine organisms. Their unique adaptations allowed them to thrive in diverse environments, contributing significantly to the biodiversity of Cretaceous marine life. The decline of rudists at the end of the Cretaceous marked a significant shift in reef-building dynamics, paving the way for modern coral reefs.
How might extinctions affect the evolution of organisms that survive the event?
The role of mass extinction in evolution. At 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. ... But mass extinction can also play a creative role in evolution, stimulating the growth of other branches.
