BIOLOGY:THE ESSENTIALS (LL) W/CONNECT
3rd Edition
ISBN: 9781260670929
Author: Hoefnagels
Publisher: MCG CUSTOM
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Chapter 20, Problem 2WIO
Summary Introduction
To determine:
The loss of one species may lead to the decline of other populations.
Introduction:
An ecological community involves a group of potentially interacting species in a particular habitat. There are several classes of interactions among organisms in different ecosystems. The ecological interactions may be intra-specific or inter-specific.
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1) Which of the following defines the niche of a species?
The role of a species in its community as well as the conditions it requires and the interactions it takes part in
All populations of all species in some area
The type of environment in which a species lives
The number of species and their relative abundance within a community
2)
Which of the following is an example of a biological factor that can affect community structure?
Tropical regions support a high species diversity by receiving the most sunlight energy.
The high temperatures of desert regions limit which species can live there.
A plant species can live only in regions with a suitable level of rainfall.
An insect herbivore inhibits the population growth of a tree species.
3)Which of the following prey defensive adaptations involves two or more prey species coming to resemble one another?
Camouflage
Startle displays…
Chapter 20 Solutions
BIOLOGY:THE ESSENTIALS (LL) W/CONNECT
Ch. 20.1 - Prob. 1MCCh. 20.1 - Prob. 2MCCh. 20.1 - Prob. 3MCCh. 20.1 - Prob. 4MCCh. 20.2 - Prob. 1MCCh. 20.2 - Prob. 2MCCh. 20.2 - Prob. 3MCCh. 20.3 - How do toxic chemicals, nutrients, sediments, and...Ch. 20.3 - Prob. 2MCCh. 20.3 - Prob. 3MC
Ch. 20.4 - Why is CO2 accumulating in Earths atmosphere?Ch. 20.4 - Prob. 2MCCh. 20.4 - Prob. 3MCCh. 20.5 - Prob. 1MCCh. 20.5 - Prob. 2MCCh. 20.5 - Prob. 3MCCh. 20.6 - Prob. 1MCCh. 20.6 - Prob. 2MCCh. 20.6 - Prob. 3MCCh. 20 - Prob. 1MCQCh. 20 - What activity is the main cause of expanding...Ch. 20 - What is the connection between agriculture in the...Ch. 20 - What is the greenhouse effect? a. The filtering of...Ch. 20 - Prob. 5MCQCh. 20 - Prob. 6MCQCh. 20 - Prob. 7MCQCh. 20 - Prob. 8MCQCh. 20 - Prob. 1WIOCh. 20 - Prob. 2WIOCh. 20 - Prob. 3WIOCh. 20 - Prob. 4WIOCh. 20 - Prob. 5WIOCh. 20 - Prob. 6WIOCh. 20 - Prob. 7WIOCh. 20 - Prob. 8WIOCh. 20 - Prob. 9WIOCh. 20 - Prob. 10WIOCh. 20 - Prob. 11WIOCh. 20 - Prob. 12WIOCh. 20 - Prob. 13WIOCh. 20 - Prob. 14WIOCh. 20 - Prob. 15WIOCh. 20 - Prob. 16WIOCh. 20 - Prob. 17WIOCh. 20 - Prob. 18WIOCh. 20 - Prob. 1SLCh. 20 - Prob. 2SLCh. 20 - Review the Survey the Landscape figure in the...Ch. 20 - Prob. 2PIT
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- What roles do competitive exclusion and character displacement play in community structure? Successional sequences are altered by consumers of pioneer species. What ecological features of the pioneer species contribute to this phenomenon? Describe the two key elements of community stability.arrow_forwardInteractions between organisms in nature may range from mutualistic to antagonistic. Give one example of mutualistic versus antagonistic interaction and discuss some ecological and evolutionary consequences of these interactionsarrow_forwardAccording to the resource-ratio hypothesis (a.k.a. R-star), what factor(s) will determine the maximum number of competing species that could possibly coexist in a community? (Note: either one or more-than-one answer could be correct) .what does the number of limiting resources in a community tell us? The number of limiting resources in the community The net primary productivity of the community (NPP). The number of trophic levels that are present in the community. | The intrinsic rate of increase (r) of each species in the community. The colonization rate of each species that can access the habitat.arrow_forward
- Based on the intermediate disturbance hypothesis, a community's species diversity is increased bya) frequent immigrations of new speciesb) moderate levels of disturbancec) intensive disturbance by humansd) stable conditions with no disturbancearrow_forwardA conceptual model representing the role, interaction, reaction, and density of essential ecosystem components is shown below. Examine the model and the relationships between the major players (i.e., predator, prey, producer). The structure's most important role is played by these major players. It's also worth noting that nutrition has been included in the model. This is the abiotic component that has a direct or indirect impact on the interaction. Question: Based on this scenario, what is the most significant role of sea otters in the marine community? Why it’s important?arrow_forwardWhich of the following statements is/are consistent with the Intermediate disturbance hypothesis? Species diversity is maximized in areas that experience high levels of disturbance Areas with low levels of disturbance will be dominated by K selected species Decades of suppression in California has likely increased diversity in our national forests Areas with intermediate levels of disturbance will have the lowest levels of diversityarrow_forward
- Based on the intermediate disturbance hypothesis,a community’s species diversity is increased by(A) frequent massive disturbance.(B) stable conditions with no disturbance.(C) moderate levels of disturbance.(D) human intervention to eliminate disturbance.arrow_forwardHabitats with moderate levels of disturbance have higher species diversity. A) True B) Falsearrow_forwardThe Canary Islands are a volcanic island chain off the western coast of Africa with a larger percentage of specialist species than generalist species. If an invasive species is introduced to one of the Canary Islands, which of the following represents an immediate impact? (NOTE: a specialist species has a narrow ecological tolerance, while a generalist has a wide ecological tolerance) The populations of the invasive species on the Canary Islands will decrease as predation increases. The population of the invasive species on the Canary Islands will decrease because they were outcompeted by native specialist species. The populations of both the invasive species and the specialist species on the Canary Islands will remain the same as a result of resource partitioning. The populations of the specialist species on the Canary Islands will decrease as competition for resources increases.arrow_forward
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