How do scientists believe that an asteroid impact in the Yucatán peninsula of Central America caused a worldwide mass extinction?Multiple Choiceby blocking the sun and inhibiting photosynthesisby using up all of the oxygen in the atmospheremost of the animals in the world were in the tropics of Central Americaby causing massive floodsby heating up the planet

Studies have shown that the formation of ______ explains the migration of animals between North America and South America and the possible cause of the extinction of most marsupial mammals on the South American continent.Multiple choice question.a land bridgea deep-water trencha meteor crateran inland sea

Paleontologists disagree over whether the Chixculub asteroid event or the Deccan Traps volcanic activity was the primary source of the environmental changes that led to the extinction of the dinosaurs 66 million years ago. Recently, a team of researchers has concluded that only volcanic activity could cause those changes. To prove this, study leads Alexander Cox and Benhin Keller developed a computer model that simulated over 300,000 possible scenarios using data from the fossil record to determine which gases were present in the environment 66 million years ago. Their model showed that large amounts of carbon dioxide and sulfur were present in the atmosphere at the time of extinction. Which finding, if true, would most directly support Cox and Keller’s conclusion?Both the Chixculub asteroid event and the Deccan Traps volcanic activity have been known to have had a significant impact on gasses present in the atmosphere.eliminateThe existing data from the fossil record is limited and may not capture the full scale of the environmental changes that could lead to an extinction event.eliminateThe amount of carbon dioxide and sulfur in the atmosphere 66 million years ago is consistent with the emissions released by the Deccan Traps.eliminateThe computer model showed a sharp decrease in the amount of organic carbon (or plant and animal matter) at the time of the Chixculub asteroid impact.

What is the main cause of a human-created mass extinction? a decrease in the amount of ozone in the atmosphere an increase in greenhouse gases a decrease in the number of nonnative species introduced an increase in the human population

The first of the "Big Five" mass extinctions to clearly have a significant asteroid impact component was at 359 mya, in the middle of the A. Holocene Period B. Hadean Period C. Devonian Period

The success or failure of a particular species through time impossible to predict because LO.15 A- the geologic record contains an incomplete history of species B- the appearance and disappearance of food sources C- mass extinction involves millions of species D- the factors that drive species to extinction are highly complex