Campbell Biology: Concepts.. (Custom Package)
8th Edition
ISBN: 9781323042649
Author: Central Texas
Publisher: PEARSON
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Textbook Question
Chapter 38, Problem 4TYK
Which of the following is characteristic of endemic species?
a. They are often found in biodiversity hot spots.
b. They are distributed widely in the biosphere.
c. They require edges between ecosystems.
d. They are often keystone species whose presence helps to structure a community.
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Which of the following is the definition for species richness?
A.
The number of species in a community.
B.
The relative abundance and species richness in a community.
C.
The number of dominant species in a community.
D.
The proportion of a given species in the community.
The process of species replacement over time in a community is called (a) global climate change. (b) succession. (c) competition. (d) community change.
Why 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.
Chapter 38 Solutions
Campbell Biology: Concepts.. (Custom Package)
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- There may be similarities between different species due to a common ancestor. Davao is known for its wide variety of fruits and other plant species that makes it more attractive to tourists, which of the following classification of the value of biodiversity is described? * A. Direct economic value B. Indirect economic value C. Aesthetic value D. both A and Carrow_forwardWhich of the following is not true of a population of largepredators in a small reserve?a. The species may disappear from the reserve.b. The species will probably undergo a populationexplosion.c. The species will probably lose genetic diversity.d. The species may overeat its prey, causing a reduction inprey population.arrow_forwardA keystone species is one whose removal from a community causes extinction of other species. How does this extinction happen?arrow_forward
- In a tropical rainforest, an open gap lacking vegetation has been created by the fall of a large tree. Which of the following statements describes the characteristics of the plant species that are last to colonize this disturbed habitat? a. they have low reproductive rates and are good competitors b. they are good colonizers c. they have high reproductive rates and are poor competitors d. they are dominated by r-selected species e. they have high species diversityarrow_forwardThe graph above is from a paper by Dave Tilman published in 1994. Which of the following statements is consistent with the graph? A) The results contradicts the intermediate disturbance hypothesis B) Increasing diversity increases community stability C) The results support the intermediate disturbance hypothesis.arrow_forwardThe first species to live on new land, such as that formed from volcanic lava, are called_________. a. climax community b. keystone species c. foundation species d. pioneer speciesarrow_forward
- The _______________ signifies that species richness is greater where two communities meet than at the center of either community. (a) edge effect (b) fundamental niche (c) character displacement (d) realized niche (e) limiting resourcearrow_forwardComplete competitors cannot coexist is a statement of the principle of (a) primary succession (b) limiting resources (c) Mllerian mimicry (d) competitive exclusion (e) character displacementarrow_forwardWhich of the following is one of the biggest threats to biodiversity? A. Invasive species B. Land protection C. Ecological conservation D. Habitat restorationarrow_forward
- 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.arrow_forwardAll 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 proceedsarrow_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_forward
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