BIOLOGY(LL)-W/ACCESS CODE >CUSTOM<
12th Edition
ISBN: 9781264058167
Author: Raven
Publisher: MCG CUSTOM
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Textbook Question
Chapter 58, Problem 1S
If 99% of the species that ever existed are now extinct, why is there such concern over the extinction rates over the last several centuries?
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Chapter 58 Solutions
BIOLOGY(LL)-W/ACCESS CODE >CUSTOM<
Ch. 58.1 - Describe the history of extinction through time.Ch. 58.1 - Prob. 2LOCh. 58.2 - Prob. 1LOCh. 58.2 - Prob. 2LOCh. 58.3 - Prob. 1LOCh. 58.3 - Explain how these causes can interact to bring...Ch. 58.4 - Prob. 1LOCh. 58.4 - Describe the potential roles of natural selection...Ch. 58.4 - Prob. 3LOCh. 58.5 - Prob. 1LO
Ch. 58.5 - Prob. 2LOCh. 58.5 - Prob. 3LOCh. 58 - If we assume that population density is a good...Ch. 58 - Prob. 2DACh. 58 - Would the extinction rate increase if an area were...Ch. 58 - Prob. 4DACh. 58 - Why do population density and growth rates differ...Ch. 58 - Why might whale populations fail to recover once...Ch. 58 - Why do small populations lose genetic variation?Ch. 58 - Prob. 1UCh. 58 - The economic value of indirect ecosystem services...Ch. 58 - The amphibian decline is best described as a....Ch. 58 - Prob. 4UCh. 58 - When populations are drastically reduced in size,...Ch. 58 - A captive-breeding program followed by release to...Ch. 58 - Historically, island species have tended to become...Ch. 58 - Ninety-nine percent of all the species that ever...Ch. 58 - To effectively address the biodiversity crisis,...Ch. 58 - The introduction of a nonnative predator to an...Ch. 58 - If 99% of the species that ever existed are now...Ch. 58 - Prob. 2SCh. 58 - Prob. 3SCh. 58 - Prob. 4SCh. 58 - Prob. 5S
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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
- A population of 1,492 finches is introduced to a rainforest. Over the next year, the finches show a death rate of 0.395 while the population drops to 1,134. What's the birth rate for this population? Is this proving to be a suitable habitat? (Two answers) a) Yes, this is a suitable habitat. The birth rate is higher than the death rate. b) No, this is not a suitable habitat. The birth rate is much lower than the death rate. c) 589 d) -358 e) 0.155 f) 0.845arrow_forwardIf the human species were to suffer a population crash, what are three species that might move in to occupy part of our ecological niche?arrow_forwardIn 2011, approximately 23% (1138) of mammal species and 12% (1253) of bird species were globally threatened. These two groups have been thoroughly studied. The case with other groups of organisms is not well known. A large number of the threatened species are concentrated in tropical rain forest habitats, where biodiversity is high. Which of the following data options could be used to determine the cause of biodiversity decline in tropical habitats?arrow_forward
- Which of the following strategies would most rapidly increasethe genetic diversity of a population in an extinction vortex?(A) Establish a reserve that protects the population’s habitat.(B) Introduce new individuals transported from other populations of the same species.(C) Sterilize the least fit individuals in the population.(D) Control populations of the endangered population’spredators and competitors.arrow_forwardSince 2000, three mammal species have been declared extinct by the IUCN: the Bramble Cay melomys (Melomys rubicola), Christmas Island pipistrelle (Pipistrellus murrayi) and the Saudi gazelle (Gazella saudiya). What is the extinction rate of mammals, in MSY, since 2000 (+/-0.01)? Assume for our purposes that 5,436 mammals have been monitored over the past 20 years.arrow_forwardDescribe the mechanisms by which human population growth and resource use causes increased extinction rates.arrow_forward
- What is the likelihood that Earth's population problems will be solved by technological advancements? Explain.arrow_forwardThe table below shows the size of species A and B populations that live on a small island near Philippine.a) State how the information in the table can be used to determine thatthe species B is the predator.b) Briefly explain TWO (2) possible ecological reasons, other than humanactivity, for the change in species A population between 1985 and 1990.c) Name TWO (2)limiting factors that keep the species B population sizefrom growing any larger.arrow_forwardCalifornia condors, large, predatory birds that were previously on the edge of extinction, have benefited from a program that raises birds in captivity and then releases them into the wild. The reintroduction program, however, is having variable success.Which of the following would have been a surprise to wildlife biologists who, after successfully breeding and raising condors, were reintroducing the condors to the wild following a precipitous decline in their number in the 1970s? (In 1982 there were only 19 condors in the wild.) Group of answer choices: Reintroduced condors laid the same number of eggs as condor pairs in captivity. Only some of the released condors fed on marine mammals; others fed on carcasses of animals as different as wolves and cows. Twelve of 19 nests had no hatchlings, and nests of the coastal population had shell fragments 34% thinner than those of condor populations more inland. Sea otter and sea lion populations declined in areas where the…arrow_forward
- Estimates indicate the average annual background extinction rate is approximately one species lost for each million species on the earth per year. True Falsearrow_forwardOne characteristic that distinguishes a populationin an extinction vortex from most otherpopulations is that(A) it is a rare, top-level predator.(B) its effective population size is lower than itstotal population size.(C) its genetic diversity is very low.(D) it is not well adapted to edge conditions.arrow_forwardAn extinction vortex describes a) changes in a population’s gene pool that lead to a loss in fitness across time. b) a species ability to adapt to changes in their environment. c) the continuous series of extinctions caused by competition between species. d) a population that has a reduction in fitness because it cannot escape a Hardy-Weinberg Equilibrium.arrow_forward
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