Biology: Life on Earth
10th Edition
ISBN: 9780321729712
Author: Gerald Audesirk, Teresa Audesirk, Bruce E. Byers
Publisher: Benjamin Cummings
expand_more
expand_more
format_list_bulleted
Concept explainers
Question
Chapter 18, Problem 4AC
Summary Introduction
To review:
The protection of the Florida Panther by the Endangered Species Act.
Introduction:
The Florida Panther, which only live in the Florida Everglades, is recently considered as an endangered species and could extinct due to human activities. It is considered as a subspecies of a cougar but recently, mitochondrial DNA analysis suggests that may be a hybrid of South American and North American cougars.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
The red wolf (Canis rufus) was once widespread in the southeastern United States but was declared to be extinct in the wild. Biologists bred captive red wolf individuals and reintroduced them into areas of eastern North Carolina, where they are federally protected as endangered species. The current wild population is estimated to be about 100 individuals. However, a new threat to red wolves has arisen: hybridization with coyotes (Canis latrans), which have become more numerous in the areas inhabited by red wolves. Although red wolves and coyotes differ in morphology and DNA, they are capable of interbreeding and producing fertile offspring. Social behavior is the main reproductive barrier between the species and is more easily overcome when same-species mates are rare. For this reason, some people think that the endangered status of the red wolf should be withdrawn and resources should not be spent to protect what is not a “pure” species. Do you agree? Why or why not?
a) Which species is more closely related to the Gray wolf, the Maned Wolf or the jackal (or are they equally related)?
b) Which species is more closely related to the jackal, the Maned wolf or the South American foxes (or are they equally related)?
A population of interbreeding birds has been split by a geological event after which the isolated part of the
population started to evolve into an incipient species with different mating rituals. Due to a recent environmental
change the two populations are now able to potentially mate again in what is called a hybrid zone. Mating does
take place every now and then but the hybrid offspring appear less able to survive. As a consequence, mating
rituals start to diverge even further. We call this process of continued divergence?
O Fusion
O Behavioral isolation
Reinforcement
O Postzygotic isolation
O Stability
Chapter 18 Solutions
Biology: Life on Earth
Ch. 18 - The science of naming and classifying organisms is...Ch. 18 - 2. 2. A scientific name consists of a(n) _________...Ch. 18 - In Linnaean classification, the eight major...Ch. 18 - 4. Systematists determine the evolutionary...Ch. 18 - Prob. 5FTBCh. 18 - The number of named species is about __________,...Ch. 18 - What contributions did Linnaeus and Darwin make to...Ch. 18 - What features would you study to determine whether...Ch. 18 - What techniques might you use to determine whether...Ch. 18 - 4. Only a small fraction of the total number of...
Knowledge Booster
Learn more about
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
- What barriers prevent wood frogs and leopard frogs from interbreeding in nature?arrow_forwardDistinct species that are able to interbreed in nature are said to “hybridize,” and their offspring are called “hybrids.” The gray oak and the Gambel oak can mate to produce fertile hybrids in regions where they co-occur. However, the gene flow in nature is sufficiently limited that, overall, the two species remain phenotypically distinct. If the hybrid offspring survive well and reproduce to the extent that there is a large population of hybrid individuals that breed between themselves but do not interbreed with either of the two original parent species (the gray and the Gambel), which of the following would you say most likely led to the new hybrid species?(a) prezygotic reproductive barriers (b) sympatric speciation (c) allopatric speciation (d) postzygotic reproductive barriers (e) none of the abovearrow_forwardCongo Grey Parrots are an endangered species; they have grey feathers covering the body, with deep red red tail feathers. An international conservation agency is breeding these birds in an attempt to improve the population numbers. There are 100 parrots total, three of which have yellow tail feathers instead of the characteristic red tail feathers (exhibited by the rest of the parrots). What is the wild type tail color? What is the mutant tail color? red is wild type, yellow is mutant grey is wild type, red is mutant yellow is wild type, red is mutant O red is wild type, yellow is mutantarrow_forward
- In the bighorn sheep population of North America, what would happen if all of the large-bodied, large-horned males were hunted, leaving only small-bodied, small-horned sheep? a)Males could no longer protect females from predators, so eventually all of the sheep would be eaten by predators. b)There would be no phenotypic variation in the population of sheep, and natural selection could not lead to males with larger horns in the future. C)The size of horns would no longer be a heritable traits, and would males would not pass this trait to their offspring. d)Males would begin to use their horns for other behaviors, such as hunting prey or being better competitors.arrow_forwardTests on wild cheetahs have shown that there is low genetic diversity among individuals. Wildlife biologists and conservationists are worried about what this means for the survival of this species. Why is low genetic variability a big problem when it comes to a species survival in a changing habitat?arrow_forwardThe loss of genetic variability within populations is an important concern for conservation biologists when trying to conserve a species whose numbers have been greatly reduced due to loss of habitat. This is true for the example of the Bengal Tiger, Clemson’s mascot. This reduction of genetic variability in small populations affects their evolutionary potential. Which of the following are NOT potential consequences of the loss of genetic variability for tiger populations? A. Increased homozygosity can lead to the expression of deleterious recessive alleles B. Increases the ability of the population to adapt to changes in the environment C. Decreases the probability that the population can withstand a disease outbreak D. Increases the risk of extinction for the populationarrow_forward
- The approximately 600 species of cichlids in East Africa’s Lake Victoria have largely resulted from sympatric speciation. The closely related cichlids species P. pundamilia and P. nyererei are thought to have arisen by sexual selection. Mate choice by females strongly favors males of their own species that have different body colors. In recent years, pollution has caused the water of Lake Victoria to become turbid in some areas. Hybrids of P. pundamilia and P. nyererei were produced and the gene pools of the two species have started to fuse, creating a new hybrid species. In this process, what are the conditions that led to the fusion of P. pundamilia and P. nyererei? A. Only the prezygotic reproductive barrier is not complete for the two species. B. Only the postzygotic reproductive barrier is not complete for the two species. C. Both the prezygotic and the postzygotic reproductive barriers are complete for the two species. D. Both the prezygotic and the postzygotic reproductive…arrow_forwardA population of lizards in Northern California is brown and is not poisonous to birds. A population of lizards in Southern California is orange and is poisonous to birds. In central California, where the two species overlap, a new species of non-poisonous, orange lizards arose. Which of the following statements best explains the existence of non-poisonous orange lizards? A) Non-poisonous brown lizards changed color once they noticed birds did not eat orange lizards. B) Non-poisonous orange lizards have a selective advantage since birds avoid orange lizards. C) Non-poisonous lizards turn orange by eating orange flowers and then pass the trait on D) Non-poisonous orange lizards have a selective disadvantage since they cannot blend in. E) Non-poisonous brown lizards are more attractive to mates.arrow_forwardNerodia sipedon insularum is a species of the Northern Water Snake that lives on islands in the western part of Lake Erie. This snake exhibits polymorphism (many color forms) and can be described as Banded (BB), intermediate (Bb) and unbanded (bb). The mainland populations of this snake are all banded. The islands have sandy shores which the snakes reside compared to rocky shores of the mainland. In 1980-1984, Richard King conducted a study of mark recapture to look at the numbers of each of these morphs of snakes and for the Island of Pelee this was the population size: Banded: 71 individuals; Intermediate: 80 individuals; Unbanded 20 individuals. Give the genotypic frequencies for each morph and then give the allele frequencies for this population.arrow_forward
- The tiny frog Paedophryne amauensis was discovered by researchers purposefully searching for the source of an unusual sound, but sometimes similarity between two species can lead scientists to accidental discoveries. A previously unknown species of wild cat was inadvertently discovered by researchers who were sequencing the DNA of a house cat–sized South American wild cat called the tigrina. The DNA analysis revealed that many alleles found in the supposed tigrinas living in northeastern Brazil are not shared with other tigrinas. This finding suggested that the northeastern cats do not interbreed with other tigrinas and are therefore a different species. What prevents the two species from interbreeding?arrow_forwardIn 1970, Atlantic leatherback sea turtle populations were very low, and the U.S. Fish and Wildlife Service listed the species as endangered. Over the next several decades, steps were taken to protect turtle nests and prevent accidental killing of turtles at sea by fishing fleets. As a result, the population of leatherbacks nesting on beaches in Florida has been growing exponentially (FIG. E31-3). What factors probably contributed to this exponential growth? Can exponential growth continue? If not,what factors are likely to cause the population to stabilize?arrow_forwardA A Ao Question 45 The atmosphere is an important source of both carbon and oxygen in aquatic systems. Question 45 options: A) True B) False Question 46 Energy sources from within an aquatic system are known as allochthonous. Question 46 options: A) True B) False Question 47 Cooperative breeding is more likely to occur Question 47 options: A) when inbreeding has no effect. B) when successful dispersal is difficult. C) when most individuals are unrelated. D) when long-distance dispersal is possible.arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Human Biology (MindTap Course List)BiologyISBN:9781305112100Author:Cecie Starr, Beverly McMillanPublisher:Cengage Learning
Human Biology (MindTap Course List)
Biology
ISBN:9781305112100
Author:Cecie Starr, Beverly McMillan
Publisher:Cengage Learning