Campbell Biology: Concepts.. (Custom Package)
8th Edition
ISBN: 9781323042649
Author: Central Texas
Publisher: PEARSON
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Chapter 38, Problem 6TYK
Summary Introduction
Introduction: Movement corridor is a narrow stretch of land connecting the other regions and has a rich diversity of animal and plant life. In some movement corridors, a number of bridges and roadways are constructed, which prevent the death of animals due to accidents by vehicles crossing the movement corridor.
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All of the statements are correct regarding ecological succession EXCEPT
Select one:
a. there is less competition earlier in the succession process
b. it is a random process
c. initial pioneer species are plants
d. species diversity increases as succession proceeds
Which of the following statements about keystone species is false?
a) Keystone species are the most common (abundant) species in their ecosystem.
b) The reintroduction of wolves into Yellowstone Park increased biodiversity.
c) Removal of a keystone species can drastically change an ecosystem.
d) Keystone species have a much greater effect on the functioning of their ecosystems than other species.
An example of a pioneer species in primary succession and a pioneer species in secondary succession, respectively, are
Select one:
a. lichens and grass
b. moss and insects
c. lichens and trees
d. grass and shrubs
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- Describe what happens to an ecosystem when a keystone species is removed.arrow_forwardThe Burmese Python, an invasive species, has been introduced to the Florida Everglades, largely through release by owners who acquired the snakes from exotic pet traders. Though the Everglades are protected, pythons as predators can not be easily controlled. What can be concluded about the effect of the python population on the biodiversity of the Everglades? A. Since the Everglades are protected, python control is limited under laws that protect species in the Everglades. B. Since the python population is growing, it will eventually become a native species and will increase biodiversity. C. Since pythons prey on many species in the Everglades, resources will be more available for surviving species and fewer will be considered endangered. D. Since pythons have no predators, they are responsible for decreasing mammal population and are a greater threat to biodiversity.arrow_forwardWhy do moderate levels of disturbance result in an increase in community diversity?a) The resulting uniform habitat supports stability, which in turn supports diversity.b) Less-competitive species evolve strategies to compete with dominant species.c) Habitats are opened up for less competitive speciesd) Competively dominant species infrequently exclude less competitive species after a moderate disturbance.arrow_forward
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