Biology
12th Edition
ISBN: 9780134813448
Author: Audesirk, Teresa, Gerald, Byers, Bruce E.
Publisher: Pearson,
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Chapter 17.4, Problem 2CYL
Summary Introduction
To describe:
Some examples of living species that are at risk of extinction.
Introduction:
The endangered species are those species whose numbers are getting low. To prevent the extinction of those species, the Endangered Species Act formed.
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Chapter 17 Solutions
Biology
Ch. 17.1 - One way to determine the number of species on...Ch. 17.1 - Prob. 1TCCh. 17.1 - The tiny frog paedophryne amauensis was discovered...Ch. 17.1 - describe how biologists define species and explain...Ch. 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 - Make a list of events or processes that could...Ch. 17.3 - How might conservation scientists use the map...
Ch. 17.3 - It is not surprising that the forests of New...Ch. 17.3 - Prob. 3TCCh. 17.3 - Prob. 4TCCh. 17.3 - Prob. 5TCCh. 17.3 - One possible explanation for the distinctive...Ch. 17.3 - describe the two general steps that are required...Ch. 17.3 - explain the difference between allopatric and...Ch. 17.3 - explain adaptive radiation and describe the...Ch. 17.3 - interpret an evolutionary tree diagram?Ch. 17.4 - If specialization puts a species at risk for...Ch. 17.4 - Prob. 1CTCh. 17.4 - describe the main causes of extinction?Ch. 17.4 - Prob. 2CYLCh. 17.4 - Given that genetic isolation is the first step in...Ch. 17 - The biological species concept is difficult or...Ch. 17 - Which of the following does not describe a...Ch. 17 - All instances of speciation require a. genetic...Ch. 17 - Analysis of Rhagoletis fly populations in North...Ch. 17 - In the initial phase of allopatric speciation,...Ch. 17 - A species is a group of ________ that evolves...Ch. 17 - Fill in the following with the appropriate...Ch. 17 - Formation of a new species occurs when two...Ch. 17 - The process by which many new species arise in a...Ch. 17 - A species may be at higher risk of extinction if...Ch. 17 - Define the following terms: species, speciation,...Ch. 17 - Many of the oak tree species in central and...Ch. 17 - Review the material on the possibility of...Ch. 17 - A drug called colchicine prevents cell division...Ch. 17 - What are the two major types of reproductive...Ch. 17 - It is difficult to perform experiments that test...
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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
- Which types of species are most vulnerable to extinction?arrow_forwardHow many species of plants and animals have been described by IUCN in 2004? What is global species diversity according to Robert May?arrow_forwardIdentify a species that your group thinks is ok to drive to extinction and justify the reasons for this decision. Can you anticipate any consequences of losing this species from the Earth?arrow_forward
- Do you think generalist or specialized species would be better able to adapt and avoid extinction if the environment changed rapidly, for example, as a result of forced climate change? Why?arrow_forwardWhat limits species’ ranges?arrow_forwardWhat is the relationship between extinction, its impact on biodiversity, and ecosystems? When a species becomes extinct, the vacancy of that species allows another species to invade and transform the ecosystem so there is no longer biodiversity, which allows the ecosystem to flourish. The extinction of plants and animals leaves a vacancy in the biodiversity of the ecosystem, which can cause the ecosystem to collapse. The extinct plants and animals can come back as a different species, creating more biodiversity within the ecosystem. The extinction of plants and animals does not have an impact on the biodiversity of an ecosystem.arrow_forward
- Define and distinguish among native, nonnative, indicator, and keystone species and give an example of each. What is an invasive species?List six factors that threaten many species of frogsand other amphibians with extinction. Describe therole of the American alligator as a keystone species.Explain why ecologists say we should protect sharks.arrow_forwardIn what ways do you think species matter and it is important to protect species from extinction, or keep them flourishing? Is there something about species or biodiversity that makes it inherently to-be-valued?arrow_forwardgive two examples of an ecological specialist that went extinct. It may be useful to look for coextinction events, in which extinction of one species led to extinction of an ecological specialist that depended on that speciesarrow_forward
- Ecologists use a rank-abundance curve to display relative species abundance, which is a component of biodiversity. It can also be used to demonstrate species richness and evenness. Figure 1 shows the rank- abundance curve for caddisflies (Order Trichoptera) of two aquatic habitats in northern Portugal (data from L.S.W. Tera). Pollution of streams, on the other hand, reduces the diversity of Trichoptera and several other groups of stream insects, reducing both species richness and species diversity. Interpret why those happened. These rank-abundance curves show that the mountain stream caddisfly community has higher species richness and greater species evenness. 0.1 - Mountain stream 0.01 Greater richness and species evenness 0,001 Coastal ponds 0.0001 20 40 60 80 Abundance rank Figure 1: Rank-abundance curve for caddisflies (Order Trichoptera) of two aquatic habitats in northern Portugal (data from L.S.W. Tera). Proportional abundancearrow_forwardIn the past, which factor would have caused a mass extinction of species?arrow_forwardDo you expect that natural selection acting within a species would increase the population size of the species? Do you expect that it would increase the rate at which new species arise, thus increasing the number of species?arrow_forward
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