Biology: Life on Earth with Physiology (11th Edition)
11th Edition
ISBN: 9780133923001
Author: Gerald Audesirk, Teresa Audesirk, Bruce E. Byers
Publisher: PEARSON
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Textbook Question
Chapter 17, Problem 5FIB
A species may be at higher risk of extinction if its geographic range includes a(n) ________ area, or if its food or habitat requirements are ______. The leading direct cause of extinction is __________.
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There are six species of animals in an area at the end of Thunder Bay. The area is wooded land covering rolling hills with two small rivers. Most of the area is surrounded by farm land where people have sheep and cows. There are three roads in the area, one of which leads to an expanding subdivision.
a) Chose the species you believe to be most likely to become endangered and the species you believe to be least likely to become endangered. Compare and contrast these two species to explain your decision
b) Which two species do you think would be most likely to exhibit a competitive relationship?
c) Explain two density-dependent factors that may affect population P in this area
d) Explain two density-independent factors that may affect population P in this area
Choose all incorrect statement.
In 2021, 23 species were declared extinct. Most of these have been presumed to be extinct for decades. Eight of the declared extinctions were bird species endemic to the Hawaiian Islands. One species declared extinct was the Molokai creeper (pictured). Main causes of their extinction include loss of suitable habitat, disease, and predation by introduced mongooses and rats. Avian malaria is transmitted between bird species in Hawaii by mosquitoes that were brought to the islands by ships many decades ago.
Which of the following statements is NOT accurate?
a.Avian malaria is a vector-borne disease; if it infects 90% of the birds regardless of bird population size, it is acting as a density-independent factor.
b.Among vertebrates, bird population sizes have declined the most compared to any other vertebrate group.
c.Eliminating invasive rats and mongooses from the Hawaiian Islands, like goats were eliminated from the Galapagos, could help prevent further…
The number of named species is about______________, butthe actual number of species on Earth is estimated to beabout ______________ or higher.
Chapter 17 Solutions
Biology: Life on Earth with Physiology (11th Edition)
Ch. 17.1 - The tiny frog paedophryne amauensis was discovered...Ch. 17.1 - describe how biologists define species and explain...Ch. 17.1 - One way to determine the number of species on...Ch. 17.1 - Prob. 1TCCh. 17.1 - describe the biological species concept and...Ch. 17.1 - list some reasons why it can be hard to tell...Ch. 17.2 - describe the main types of premating and...Ch. 17.2 - provide examples of each type of mechanism?Ch. 17.3 - It is not surprising that the forests of New...Ch. 17.3 - describe the two general steps that are required...
Ch. 17.3 - Make a list of events or processes that could...Ch. 17.3 - One possible explanation for the distinctive...Ch. 17.3 - explain the difference between allopatric and...Ch. 17.3 - How might conservation scientists use the map...Ch. 17.3 - explain adaptive radiation and describe the...Ch. 17.3 - Prob. 3TCCh. 17.3 - interpret an evolutionary tree diagram?Ch. 17.3 - Prob. 4TCCh. 17.4 - Prob. 1CTCh. 17.4 - describe the main causes of extinction?Ch. 17.4 - If specialization puts a species at risk for...Ch. 17.4 - Prob. 2CYLCh. 17.4 - Given that genetic isolation is the first step in...Ch. 17 - It is difficult to perform experiments that test...Ch. 17 - A species is a group of ________ that evolves...Ch. 17 - The biological species concept is difficult or...Ch. 17 - Define the following terms: species, speciation,...Ch. 17 - Fill in the following with the appropriate...Ch. 17 - Which of the following does not describe a...Ch. 17 - Many of the oak tree species in central and...Ch. 17 - Formation of a new species occurs when two...Ch. 17 - All instances of speciation require a. genetic...Ch. 17 - Review the material on the possibility of...Ch. 17 - The process by which many new species arise in a...Ch. 17 - Analysis of Rhagoletis fly populations in North...Ch. 17 - A drug called colchicine prevents cell division...Ch. 17 - A species may be at higher risk of extinction if...Ch. 17 - In the initial phase of allopatric speciation,...Ch. 17 - What are the two major types of reproductive...
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- Tectonic plates can affect ______ environmental changes, which might be a cause for species extinction.arrow_forwardAll species, both past and present, are related to one another through a(n) ______ history.arrow_forwardGive your response to the following statement: “Eventually, all species become extinct. So it does not reallymatter that the world’s remaining tiger species or atropical forest plant are endangered mostly because ofhuman activities.” Be honest about your reaction, andgive arguments to support your position.arrow_forward
- A group of birds colonize an island. Over time, they become different from the mainland source population and reach the point where they can no longer interbreed with one another They are now called _________________ and the process is called ________________speciation. 1) 2) 3) 4)arrow_forwardSeveral alternative definitions of the term species have been proposed, recognizing different species, definitions raises conceptual problems, but it does not have practical implications for conservation true or falsearrow_forwardIdentify 4 characteristics of a species that cause them to be vulnerable to extinction. Just the characteristic is acceptable.arrow_forward
- In a species of water snake has populations on the mainland and on an island, snakes are regularly washed from the mainland to the island where they become part of the breeding population on the island. For the island population, this violates the assumption of ______________________ because the evolutionary mechanism of________________ is present.arrow_forwardSpecies rarity does not necessarily mean that a species is in danger of extinction. Discuss.arrow_forwardMatch the definitions on the left with the vocabulary words on the right. The level of diversity within a given species The number of different species within a specific region or area The variety of ecosystems in a given region or area the degree to which different species in a given ecosystem, or area, depend on other species in that area for survival ::species interdependence :: ecosystem diversity genetic diversity species diversityarrow_forward
- Is the species a generalist or a specialist and how does this niche impact the species of the wild. The giant panda, native to China, and the raccoon, native to North America, share a common ancestor. However, their current status in the wild is anything but common. Raccoons are thriving. Opportunists by nature, raccoons forage on a variety of plants and animals in their ecosystem. Highly inquisitive and intelligent, raccoons use their opposable thumbs to crack open shells, investigate dens, and sift through rocky streams in search of crayfish. Although their habitats are shrinking, raccoons have adapted well to human encroachment and will actively seek food and shelter among the human communityarrow_forwardComplete the table below?arrow_forwardVisit the website of International Union of Conservation of Nature (IUCN) and open the Red List of Threatened Species, https://www.iucnredlist.org/. Research a species (plant or animal) of your choice, submit your findings containing the following information: Species name and picture UICN status Species origin Population size Threats Conservation Actionarrow_forward
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