ACHIEVE FOR BIOLOGY:HOW LIFE WORKS-EBOOK
3rd Edition
ISBN: 9781319284367
Author: Morris
Publisher: Macmillan Higher Education
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Chapter 33.4, Problem 8SAQ
Summary Introduction
An extinction event is a prevalent and rapid decrease in the biodiversity on the earth. The extinction event is recognized by a sharp alteration in the diversity and abundance of multicellular organisms. The extinction event occurs if the extinction rate increases with respect to the
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WHAT IS MASS EXTINCTION? HOW DID MASS EXTINCTION EVENTS INFLUENCE EARTH'S HISTORY?
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ACHIEVE FOR BIOLOGY:HOW LIFE WORKS-EBOOK
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- How have humans influenced extinctions?arrow_forwardIncreases in species diversity arise because of A)increases in the rate of speciation. B)decreases in the rate of extinction. C)higher rates of speciation than extinction. D)All of the above The rates of extinction since the origin of life have followed which pattern? A)Gradual decrease B)Gradual increase C)No change D)Several episodes of mass extinctions, with much lower rates of fluctuating extinctions in between Which of the following statements about the outcome of the evolution of a new species through hybridization is false? A)The new species is always an intermediate of the two parent species. B)The new species may have traits that allow it to inhabit environments different from both parental species. C)The new species may have greater genetic diversity and therefore greater trait diversity than the parental species. D)All of the above How can ecological processes influence the evolution of a population? A)Ecological…arrow_forwardWhat the difference between background extinction and biological extinction?arrow_forward
- What patterns can be compare to the mass Extinctions events?arrow_forwardWhich of the following is likely a reason why evolutionary radiation would occur on islands? A) there are many more species on islands B) islands tend to have more favourable habitats than continents because they are moderated by the ocean C) islands may have fewer animal and plant groups and thus provide more ecological opportunities D) organisms can disperse easily across oceans E) islands often have more diverse habitats than continentsarrow_forwardWhich eon has more events occurring in it? During which eon did life evolve? What is the difference between background extinctions and mass extinctions?arrow_forward
- Throughout Earth’s history, many species, and perhaps even most of the species that ever existed, have become extinct. The causes are numerous: climate change, volcanic activity, the actions of oxygen-producing organisms, changes in carbon dioxide concentration, and even asteroid impacts. Have humans ever caused extinctions?arrow_forwardGeologic changes often accompany mass extinction of life forms. Why do you think this is true?arrow_forwardWhat is a mass extinction? What makes the 6th mass extinction that is happening right now different from the last 5?arrow_forward
- How does finding the same fossils of a land animal on two different continents support the hypothesis of continental drift? A) The land animal fossil is now found in colder parts of the world which means the continents had drifted since the fossils were made. B) The land animal fossil could only have ended up fossilized on both continents if they were once together C) The land animal fossil was unable to swim across oceans so the fact that its fossils were found on distant continents suggested those continents had once been fused together as later moved apart. D) The land animal fossil wasnt found in Asia which wegner thought was only stable continent that hadn’t moved.arrow_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_forwardDistinguish between biological extinction and mass extinction. Does every species have the right to survive without human interference, regardless of whether they serve a useful purpose to humans? Explain?arrow_forward
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