Life: The Science of Biology
11th Edition
ISBN: 9781319010164
Author: David E. Sadava, David M. Hillis, H. Craig Heller, Sally D. Hacker
Publisher: W. H. Freeman
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Chapter 58.1, Problem 3R
Summary Introduction
To review:
The difficulties faced during determining the species, which are extinct or threatened with extinction.
Introduction:
The anthropogenic activities like deforestation, pollution, indiscriminate construction, and population explosion are responsible for the biodiversity loss. These factors impose a strain on the species, which lead to their extinction. Prior to becoming extinct, a species number determines its current status. The International Union for Conservation of Nature (IUCN) categorizes species on the basis of their number into several classes like rare, threatened, endangered, critically endangered, and extinct.
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Which types of species are most vulnerable to extinction?
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Life: The Science of Biology
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- What are possible prevention of extinction that we can do alone?arrow_forwardWhat is mainly responsible for the extinction of wildlife?arrow_forwardIf 99% of the species that ever existed are now extinct, why is there such concern over the extinction rates over the last several centuries?arrow_forward
- With an extinction rate of 100 E/MSY and an estimated 10 million species, how many extinctions are expected to occur in a century?arrow_forwardWhat are the major causes of species losses in a geographical region?arrow_forwardWhy do you suppose there are so many endemic species—that is, species found nowhere else—on islands? Why have the overwhelming majority of recent extinctions occurred on islands?arrow_forward
- why is it bad that there are a lot of endangered species and certain ecosystems are collapsing and from distress?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_forwardDo resources have to be present in limited supplies for competition to shape species niches?arrow_forward
- Why do ecologists consider both species richness and species evenness when they quantify species diversity?arrow_forwardCan you think of a situation where we deliberately want to make a species extinct? How would you justify it?arrow_forwardWhat is happening to the forest of Madagascar and what is the outcome? Why is saving the biodiversity of Madagascar so important? Why does Australia have such an unusual variety of spiders? What are five reasons species are becoming extinct? What does it mean for a species to be extinct? Give an example How do invasive species travel or spread to a different ecosystem? Give an example. List and describe five examples of declining biodiversity five actions that individuals can do to help create and support biodiversity?arrow_forward
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