Biology 2e
2nd Edition
ISBN: 9781947172517
Author: Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher: OpenStax
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Textbook Question
Chapter 47, Problem 17CTQ
Describe the evidence for the cause of the Cretaceous-Paleogene (K-Pg) mass extinction
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Chapter 47 Solutions
Biology 2e
Ch. 47 - Figure 47.6 Scientists measured the relative...Ch. 47 - Figure 47.9 The Svalbard Global Seed Vault is...Ch. 47 - Converting a prairie to a farm field is an example...Ch. 47 - Figure 47.16 Which of the following statements is...Ch. 47 - With an extinction rate of 100 E/MSY and an...Ch. 47 - An adaptive radiation is.__________ a burst of...Ch. 47 - The number of currently described species on the...Ch. 47 - A mass extinction is defined as. a loss of 95...Ch. 47 - A secondary plant compound might be used for which...Ch. 47 - Pollination is an example of_____________ a...
Ch. 47 - What is an ecosystem service that performs the...Ch. 47 - Which two extinction risks may be a direct result...Ch. 47 - Exotic species are especially threatening to what...Ch. 47 - Certain parrot species cannot be brought to the...Ch. 47 - What was the name of the first international...Ch. 47 - About what percentage of land on the planet is set...Ch. 47 - Describe the evidence for the cause of the...Ch. 47 - Describe the two methods used to calculate...Ch. 47 - Explain how biodiversity loss can impact crop...Ch. 47 - Describe two types of compounds from living things...Ch. 47 - Describe the mechanisms by which human population...Ch. 47 - Explain what extinction threats a frog living on a...Ch. 47 - Describe two considerations in conservation...Ch. 47 - Describe what happens to an ecosystem when...
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- 29) The Cretaceous extinction. which was the most recent mass extinction, occurred about 65.5 million years ago. What is the leading hypothesis to explain the Cretaceous extenction? A) The Indian sub-continent collided with the Asian techtonic plate, giving rise to the Hymalayan mountains which altered the jet stream and caused the planet to enter an ice age B) An asteroid about 6 km in diameter collided with Earth, which vaporized the caribbean ocean, set fire to north and south America, and expelled enough dust into the atmosphere to block the sun enough to result in a winter like environment all across the globe for several years C) A new group of predators evolved that were significantly better at capturing prey, to the point that they drove many species (including other predators and eventually themselves) to extinction D) Massive amounts of volcanic activity released tons of CO2, enough to significantly increase the temperature of the planet 30) The Permian extinction, which…arrow_forwardExplain what significant events happened during the Five major extinction events between the late Cambrian until the late cretaceous period.arrow_forwardThe best studied of the mass extinctions is the Cretaceous extinction. Why do you think it has been better studied than the other extinctions?arrow_forward
- Scientists are examining the possible role of a large asteroid in the cretaceous mass extinction event. A large asteroid strike would likely have caused rapid climate cooling and the diffusion of sunlight. which of the following statements are the best null and alternative hypotheses when scientists look at the geologic evidence of extinction related to the asteroid strike?arrow_forwardScientists are examining the possible role of a large asteroid in the Cretaceous mass extinction event. A large asteroid strike would likely have caused rapid climate cooling and diffusion of sunlight. Which of the following statements are the best null and alternative hypotheses when scientists look at the geologic evidence of extinction related to the asteroid strike? Null: The rate of extinction would be steady over the entire length of time the climate was altered. Alternative: The rate of extinction would be greatest immediately before the asteroid strike. Null: The rate of extinction would gradually decrease over the entire length of time the climate was altered. Alternative: The rate of extinction would be at its lowest immediately after the asteroid strike. Null: The rate of extinction would be steady over the entire length of time the climate was altered. Alternative: The rate of extinction would be greatest immediately after the asteroid strike. Null: The rate of extinction…arrow_forwardWhich of the following mass extinctions caused the loss of over 80% of species and was due to increased volcanic activity in what is now Siberia, Russia? The Permian-Triassic Mass Extinction The Cretaceous-Paleogene Mass Extinction The Triassic-Jurassic Mass Extinction The Ordovician-Silurian Mass Extinctionarrow_forward
- (A) What is extinction? How extinction is different from expiration? Explain. (B)List the five mass extinction episodes occurred in the history of Earth. Characterize the nature and extent of each extinction episode.arrow_forward"Human induced extinctions are therefore undesirable" Explain this ?arrow_forwardWhat patterns can be compare to the mass Extinctions events?arrow_forward
- Please answer botharrow_forwardThe Permian extinction, which was the second most recent mass extinction, occurred about 251 million years ago. What is the leading hypothesis to explain the Permian extenction? An asteroid about 6 km in diameter collided with Earth, which vaporized the caribbean ocean, set fire to north and south America, and expelled enough dust into the atmosphere to block the sun enough to result in a winter like environment all across the globe for several years The Indian sub-continent collided with the Asian techtonic plate, giving rise to the Hymalayan mountains which altered the jet stream and caused the planet to enter an ice age Massive amounts of volcanic activity released tons of CO2, enough to significantly increase the temperature of the planet A new group of predators evolved that were significantly better at capturing prey, to the point that they drove many species (including other predators and eventually themselves) to extinctionarrow_forwardWe have looked at what the fossil record can tell us about the amazing History of Life on Earth. We've examined the evidence for an early origin for life in the sea, 3800 million years, and investigated how life invaded life about 500 million years. We've also discussed the subsequent boom in life that massively increased biodiversity but also noted how the History of Life is frequently punctuated by mass extinctions. Today we stand on the threshold of a new mass extinction event. The biodiversity that we take for granted and that sustains humans is threatened to a degree only rarely seen in 4500 million years of Earth History. NOW TO CONCLUDE, ANSWER THE QUESTION. 1. ARE WE ON THE BRINK OF A MASS EXTINCTION? WHAT WOULD BE THE CONSEQUENCES FOR SOCIETY OF LOSING HALF OF ALL SPECIES BY 2100? ARE THERE ACTIONS THAT WE CAN TAKE AS INDIVIDUALS AND AS SOCIETY TO HELP PROTECT LIFE ON EARTH?arrow_forward
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