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 31, Problem 2MC
Summary Introduction
Introduction:
Species play an important role in the ecosystem. They help in maintaining species diversity, food chain or food balance, structuring community, the health of an ecosystem by maintaining the ecological balance.
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The relative abundance of any one species within a community of many species is known as
a.
species evenness.
b.
species richness.
c.
specialization.
d.
population.
According to the competitive exclusion principle,a. one species is always more competitive than another for a particular food source.b. competition excludes multiple species from using the same food source.c. no two species can occupy the same niche at the same time.d. competition limits the reproductive capacity of species.
A species that has an immediate threat to extinction is said to be:a. threatened. c. alien.b. endangered. d. extinct.
Chapter 31 Solutions
Biology: Life on Earth with Physiology (11th Edition)
Ch. 31.1 - describe the goals of conversation biology?Ch. 31.1 - Prob. 2CYLCh. 31.2 - Prob. 1CSCCh. 31.2 - describe the major categories of ecosystem...Ch. 31.2 - Prob. 1TCCh. 31.2 - Prob. 2CYLCh. 31.3 - define mass extinction?Ch. 31.3 - Prob. 1HYEWCh. 31.3 - explain why biologists fear that a mass extinction...Ch. 31.4 - Prob. 1CSC
Ch. 31.4 - Prob. 1CYLCh. 31.4 - Prob. 1TCCh. 31.4 - Prob. 2CYLCh. 31.5 - Prob. 1CSCCh. 31.5 - Prob. 1CYLCh. 31.5 - Prob. 1TCCh. 31.5 - Prob. 2CYLCh. 31.6 - Before 1700, wolves roamed over almost all of...Ch. 31.6 - describe the principles of sustainable...Ch. 31.6 - In 1970, Atlantic leatherback sea turtle...Ch. 31.6 - explain how population, technology, and lifestyle...Ch. 31 - List some reasons that the ecological footprints...Ch. 31 - Prob. 1FIBCh. 31 - A factor that increases humanity ecological...Ch. 31 - Prob. 1RQCh. 31 - Search for and describe some examples of habitat...Ch. 31 - Prob. 2FIBCh. 31 - Prob. 2MCCh. 31 - What is ecological economics? Why is it important?Ch. 31 - Prob. 3FIBCh. 31 - Prob. 3MCCh. 31 - Prob. 3RQCh. 31 - Prob. 4FIBCh. 31 - Prob. 4MCCh. 31 - Prob. 4RQCh. 31 - The smallest population of a species that is...Ch. 31 - Which of the following is not true of a population...Ch. 31 - Why are efforts to protect monarch butterflies a...Ch. 31 - A Native American saying tells us that We do not...
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- a black bear accidentally stepped on a ladybug beetle, and the beetle survived. What type of ecological species interaction is this? a. amensalism b. commensalism c. neutral d. it is not a species interaction, because this incident does not affect the fitness of bears or ladybug populations e. the answer depends on whether that ladybug's fitness is affected negativelyarrow_forwardThe population cycles of many prey species are often generated by predators anda. mimicry.b. food plants.c. weather patterns.d. water availability.arrow_forwardWhen an invasive species alters the community structure it is introduced to, what can the consequence be? a. extinction of economically important species b. reduced predation on some native species c. increased predation on some native species d. all of the abovearrow_forward
- 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.arrow_forwardConservation hotspots are best described as a. areas with large numbers of endemic species, in many of which species are disappearing rapidly. b. areas where people are particularly active supporters of biological diversity. c. islands that are experiencing high rates of extinction. d. areas where native species are being replaced with introduced species.arrow_forwardThe physical surroundings in which a species is normally found is its A. Community B. Habitat C. Home range D. Nichearrow_forward
- The function of an organism is its: A. EcosystemB. Population C. Niche D. Habitatarrow_forwardThis map shows the spread of the red fire ant after its introduction into the United States in Mobile, Alabama, in the 1930s: Which statement best explains the importance of interspecific relationships in the success of this invasive species?a. Ecosystems with more resources will support the red ant over the native ant b. Invaded communities with higher species richness will allow the red ant to thrive c. Communities with fewer feeding relationships are less resilient to change. d. Native ants have a higher relative abundance compared to the invasive red ant.arrow_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
- If an ecosystem is greatly altered by the removal of a species, that species is referred to as A. Endangered B. Keyston C. Founder Species D. K-selectedarrow_forwardPredators that are specialists usually have a population abundance: a. That is usually very small. b. That repeatedly oscillates up and down. c. That is very constant. d. That is mainly affected by climatic factors. e. That may locally go extinct (so depends on immigration).arrow_forwardInthe Lotka-Volterra predation model, a prey (host) population in the absence ofpredators would:a.grow exponentially.b.grow logistically.c.grow exponentially, and then crash when it has outstripped its own foodsupply.d.decline to extinction.e.the model makes no assumptions about what happens in the absence ofpredators.arrow_forward
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