Campbell Essential Biology (7th Edition)
7th Edition
ISBN: 9780134765037
Author: Eric J. Simon, Jean L. Dickey, Jane B. Reece
Publisher: PEARSON
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Chapter 14, Problem 15BS
Many biologists think the current rate of species extinction indicates that a sixth mass extinction is underway. Life has endured numerous mass extinctions and has always bounced back. How might the impact of human activities make this sixth mass extinction different from previous mass extinctions?
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If a sixth extinction event is occurring, how is it similar or different from the previous five mass extinctions? What sort of evidence do you think scientists look for to determine whether we are living through a mass extinction?
What are the five mass extinctions of the past and the current theory of the sixth mass extinction? For each extinctions, what caused the extinction and how was ecosystem stability impacted? Was there any speciation that occurred afterward?
Increases 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
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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…
Chapter 14 Solutions
Campbell Essential Biology (7th Edition)
Ch. 14 - Distinguish between microevolution, speciation,...Ch. 14 - Identify each of the following reproductive...Ch. 14 - Why is a small, isolated population more likely to...Ch. 14 - Many species of plants and animals adapted to...Ch. 14 - Mass extinctions a. cut the number of species to...Ch. 14 - Prob. 6SQCh. 14 - A paleontologist estimates that when a particular...Ch. 14 - Why are biologists careful to distinguish...Ch. 14 - In the three-domain system, which two domains...Ch. 14 - Prob. 10IMT
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- Distinguish 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_forwardClade A began diversifying 20 million years ago. There are 33 living species in Clade A and 6 species have gone extinct. Clade B began diversifying 10 million years ago. It has 14 living species and 5 species in Clade B have gone extinct. CALCULATE SPECIATION, EXTINCTION AND NET DIVERSIFICATION RATE (to the nearest 2 decimal places) TO DETERMINE WHETHER NET DIVERSIFICATION DIFFERS BETWEEN THE TWO CLADES. Clade B has higher net diversification because despite having a higher extinction rate, it also has a higher speciation rate compared with Clade A. Clade A has higher net diversification because despite having a lower speciation rate, it also has a lower extinction rate compared with Clade B. Clade A has higher net diversification because it has both a higher speciation rate and a lower extinction rate than Clade B. Clades A and B have the same net diversification; Clade A has a higher speciation rate, but Clade B has a lower extinction rate. Clades A and B have the same net…arrow_forwardWhich of the following is believed to be common among all mass extinction events? the type of event that causes the extinction the number of species that went extinct a significant change in the global climate the type of species that went extinctarrow_forward
- Adaptive radiations can be a direct consequence of three of the following four factors. Select the factor that is NOT a direct consequence of adaptive radiation. Select one: a. Genetic drift b. Vacant ecological niches (niches are environment "space" where a particular organism has resources required to survive and reproduce) c. New evolutionary innovations d. Colonization of a new region that contains suitable habitat and few competitor speciesarrow_forwardHOW MANY MASS EXTINCTION EVENTS HAS EARTH WITNESSED SO FAR?arrow_forwardBecause mass extinction is a natural process that may facilitate evolution during the period of thousands to millions of years that follow it, should humans be concerned about the current mass extinction we are causing? Why or why not?arrow_forward
- Why is studying extinctions is critical for our survival?arrow_forwardFind the flaws within the sentance/s Extinction is the complete disappearance of a species from Earth. A mass extinction is when more than half of all extant species disappear from the fossil record and there have been at least five of them. In order to prevent the extinction current species, some areas of earth are preserved while others are conserved. Conservation seeks to prohibit human activity in an area. Preservation seeks the sustainable use and management of natural resources. An endemic species is only found in one location. A biodiversity hotspot has over 1500 species of endemic insects and 70% of the area has been disturbed. There are 34 biodiversity hotspots on Earth. Many sustainable practices are used in agriculture. Crop rotation is the practice of growing different kinds of crops in the same area in sequenced seasons. Conservation tillage is any method of soil cultivation that completely tills under the soil to prepare for the next crop. Genetically modified crops are…arrow_forwardWhat are some of the hypothesized causes of Earth’s biggest mass extinctions?arrow_forward
- Which of the following statements about extinction is not correct? (a) extinction is the permanent loss of a species (b) extinction is a natural biological process (c) once a species is extinct, it never reappears (d) human activities have little impact on extinctions (e) thousands of plant and animal species are currently threatened with extinctionarrow_forwardWhat is the difference between micro- and macroevolution? a. Microevolution describes the evolution of small organisms, such as insects, while macroevolution describes the evolution of large organisms, like people and elephants. b. Microevolution describes the evolution of microscopic entities, such as molecules and proteins, while macroevolution describes the evolution of whole organisms. c. Microevolution describes the evolution of populations, while macroevolution describes the emergence of new species over long periods of time. d. Microevolution describes the evolution of organisms over their lifetimes, while macroevolution describes the evolution of organisms over multiple generations.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_forward
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