Biology: Life on Earth with Physiology (11th Edition)
11th Edition
ISBN: 9780133923001
Author: Gerald Audesirk, Teresa Audesirk, Bruce E. Byers
Publisher: PEARSON
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Chapter 28, Problem 3MC
Summary Introduction
Introduction:
A community involves many species that depend on the special type of species, termed as a keystone species. Some ecologists use the strategy of removing each species artificially to identify the keystone species. For example, sea stars that is a keystone species act as predators in tide pools.
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A keystone speciesa. is always a carnivore.b. has a minor influence on community structure.c. has a major influence on community structure out of proportion to its numbers.d. has a major influence on community structure only when present in large numbers.
Which of the following best describes a keystone species?
a. An organism, whose introduction causes or is likely to cause environmental harm
b. An organism, who if removed, the entire ecosystem changes.
c. Can signal a change in the biological condition of a particular ecosystem and diagnose the health of that ecosystem
d. Can indirectly protect several other species in the same habitat
According to the Enemy Release Hypothesis:
a.
Predators and pathogens experience population increase when invasive species become extinct
b.
Invasive species allow other species in the habitat to escape their normal enemies
c.
Predators and pathogens have significantly greater ability to invade other habitats than any other organisms
d.
Invasive species perform well in foreign habitats as they because not face their normal enemies
e.
Invasive species replace the native enemies of resident species
Chapter 28 Solutions
Biology: Life on Earth with Physiology (11th Edition)
Ch. 28.1 - define a community and explain why community...Ch. 28.1 - Prob. 2CYLCh. 28.1 - Prob. 3CYLCh. 28.2 - Prob. 1CSCCh. 28.2 - Prob. 1CTCh. 28.2 - compare interspecific and intraspecific...Ch. 28.2 - explain how competitive exclusion leads to...Ch. 28.3 - define predator and parasite, and distinguish...Ch. 28.3 - Prob. 1HYEWCh. 28.3 - Prob. 1TC
Ch. 28.3 - provide examples of how predators and prey have...Ch. 28.3 - Prob. 2TCCh. 28.3 - Prob. 3CYLCh. 28.3 - Prob. 3TCCh. 28.3 - Prob. 4CYLCh. 28.3 - Prob. 4TCCh. 28.3 - Prob. 5CYLCh. 28.4 - Prob. 1CYLCh. 28.4 - Prob. 2CYLCh. 28.5 - Prob. 1CSCCh. 28.5 - Prob. 1CYLCh. 28.5 - Prob. 2CYLCh. 28.6 - explain the process of succession and its general...Ch. 28.6 - People have suppressed fires for decades. How...Ch. 28.6 - Prob. 2CYLCh. 28.6 - Prob. 2TCCh. 28 - Prob. 1ACCh. 28 - Prob. 1FIBCh. 28 - Prob. 1MCCh. 28 - Define an ecological community, and describe the...Ch. 28 - Prob. 2ACCh. 28 - Prob. 2FIBCh. 28 - Which of the following statements is not true of...Ch. 28 - Prob. 2RQCh. 28 - Prob. 3FIBCh. 28 - Prob. 3MCCh. 28 - Prob. 3RQCh. 28 - Prob. 4FIBCh. 28 - Prob. 4MCCh. 28 - Prob. 4RQCh. 28 - Prob. 5FIBCh. 28 - Prob. 5MCCh. 28 - Provide examples of two climax and two subclimax...Ch. 28 - Prob. 6FIBCh. 28 - Prob. 6RQCh. 28 - Prob. 7RQ
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- A population will most likely deplete the resources of its environment if the population . A. grows beyond carrying capacity B. must share resources with many other species C. moves frequently from one habitat to another D. has a low reproductive potentialarrow_forwardAkeystone species is one:a.that makes up a very large proportion of total community biomass.b.that feeds on a very large fraction of all available prey species.c.that is fed on by a very large fraction of all predators in itscommunity.d. whose feeding activities have adisproportionate effect on the structure of its community.e.that occupies the lowest level (the base) of the food web.arrow_forwardAt any point in time, a number of environmental objectives must be met with a limited amount of economic resources. This means that once an environmental problem is identified, they have to be prioritized. In general, this is done using scientific valuation of the relative risk to human health and the ecology of a given environmental hazard - a procedure known as: A. Biodiversity B. Public Goods C. Risk Assessment D. Profit maximizationarrow_forward
- A keystone species is not necessarily abundant in a community but has a large impact on surrounding species and community structure. True O Falsearrow_forwardMaximum population an area can sustain A. Arithmetical Growth B. Carrying Capacity C. Intrinsic Rate of Growth D. Exponentialarrow_forwardWhich of the following defines the role of a species in a community,including its habitat and interaction with other species?a. ecological nicheb. competitive exclusionc. competition leveld. mimicrye. None of these are correctbarrow_forward
- Some attempts to use biological controls prove ineffective. Although the introduced control agent targets only the expected pest species, the control agent does not take hold and spread in its new habitat. Describe some community interactions that could slow or prevent an introduced biological control agent from becoming established in a new habitat.arrow_forwardThe population size of a species capable of being supported by the environment is called its ________. a. limit b. carrying capacity c. biotic potential d. logistic growth patternarrow_forwardDescribe the potential effects when a keystone species is removed from a community.arrow_forward
- _______________ competition occurs within a population, and _______________ competition occurs among populations of different species. (a) Interspecific; intraspecific (b) Intraspecific; interspecific (c) Type I survivorship; Type II survivorship (d) Interference; exploitation (e) Exploitation; interferencearrow_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_forwardA limiting resource does all the following except that it (a) tends to restrict the ecological niche of a species (b) is in short supply relative to a species need for it (c) limits the presence of a species in a given community (d) results in an intermediate disturbance (e) may be limiting for only part of an organisms life cyclearrow_forward
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