Bio 121 Campbell Biology Truman College
17th Edition
ISBN: 9781323670637
Author: Urry, Cain
Publisher: PEARSON
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Chapter 54, Problem 1TYU
Summary Introduction
Introduction: Community is a dynamic entity. Its structure can change with time. The dynamics of a community can be easily studied by observing the feeding relationship that exists between groups of organisms.
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Chapter 54 Solutions
Bio 121 Campbell Biology Truman College
Ch. 54.1 - Explain how competition, predation, and mutualism...Ch. 54.1 - According to the principle of competitive...Ch. 54.1 - MAKE CONNECTIONS Figure 24.14 illustrates how a...Ch. 54.2 - What two components contribute to species...Ch. 54.2 - How is a food chain different from a food web?Ch. 54.2 - Prob. 3CCCh. 54.2 - MAKE CONNECTIONS Rising atmospheric CO2, levels...Ch. 54.3 - Why do high and low levels of disturbance usually...Ch. 54.3 - Prob. 2CCCh. 54.3 - WHAT IF? Most prairies experience regular fires,...
Ch. 54.4 - Describe two hypotheses that explain why species...Ch. 54.4 - Prob. 2CCCh. 54.4 - WHAT IF? Based on MacArthur and Wilson's island...Ch. 54.5 - What are pathogens?Ch. 54.5 - WHAT IF? Rabies, a viral disease in mammals, is...Ch. 54 - Interspecific interactions affect the survival and...Ch. 54 - Based on indexes such as Shannon diversity, is a...Ch. 54 - Is the disturbance pictured in figure 54.25 more...Ch. 54 - How have periods of glaciation influenced...Ch. 54 - Prob. 54.5CRCh. 54 - Prob. 1TYUCh. 54 - The principle of competitive exclusion states that...Ch. 54 - Based on the intermediate disturbance hypothesis,...Ch. 54 - According to the island equilibrium model, species...Ch. 54 - Prob. 5TYUCh. 54 - Prob. 6TYUCh. 54 - Prob. 7TYUCh. 54 - The most plausible hypothesis to explain why...Ch. 54 - Community 1 contains 100 individuals distributed...Ch. 54 - Prob. 10TYUCh. 54 - EVOLUTION CONNECTION Explain why adaptations of...Ch. 54 - Prob. 12TYUCh. 54 - WRITE ABOUT A THEME: INTERACTIONS In Batesian...Ch. 54 - Prob. 14TYU
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- A symbiotic association in which organisms are beneficial to one another is known as (a) predation (b) interspecific competition (c) intraspecific competition (d) commensalism (e) mutualismarrow_forward1. An ecologist studying several forest dwelling, insect eating bird species does not find any evidence of interspecific competition. The most likely explanation is (A) lack of a keystone species, (B) resource partitioning, (C) low species richness, (D) pronounced intraspecific competition, (E) coevolution of predator-prey strategies.arrow_forwardBased 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_forward
- In a food web, two different species can directly affect each other’s abundance via _ competition or may in fact have their abundance indirectly regulated by a higher trophic level, a phenomenon called ____ competition. a) Intraspecific, apparent b) Interspecific, apparent c) Intraspecific, apparent d) Apparent, interspecificarrow_forwardFood chains are sometimes short because(A) only a single species of herbivore feeds on each plantspecies.(B) local extinction of a species causes extinction of the otherspecies in its food chain.(C) most of the energy in a trophic level is lost as energy passesto the next higher level.(D) most producers are inedible.arrow_forwardWhat is the single greatest threat to biodiversity?(A) overharvesting of commercially important species(B) habitat alteration, fragmentation, and destruction(C) introduced species that compete with native species(D) novel pathogensarrow_forward
- Which of the following organisms is incorrectlypaired with its trophic level?(A) cyanobacterium—primary producer(B) grasshopper—primary consumer(C) zooplankton—primary producer(D) fungus—detritivorearrow_forward1. a)Write an essay on ecosystem productivity. b) Define ecological pyramid and indicate the limitations of ecological pyramids. c) Explain why detritivores, decomposers and omnivores are not assigned trophic level.arrow_forwardA complex of interconnected food chains in an ecosystem is called (a) an ecosystem (b) a pyramid of numbers (c) a pyramid of biomass (d) a biosphere (e) a food webarrow_forward
- A specie’s ________ is the totality of its adaptations, its use of resources, and its lifestyle. (A) habitat, (B) ecotone, (C) ecological niche, (D) competitive exclusion, (E) coevolution.arrow_forwardHow does individual behavior decrease biotic potential? a) It reduces the reproductive rates of individuals, due to competition for resources. b) It supports all individuals of the population to obtain needed resources. c) It increases the population under harsh environmental conditions. d) It decreases the amount of intraspecific competition.arrow_forwardWhich of the following is a consequence of biologicalmagnification?(A) Toxic chemicals in the environment pose greater risk totop-level predators than to primary consumers.(B) Populations of top-level predators are generally smallerthan populations of primary consumers.(C) The biomass of producers in an ecosystem is generallyhigher than the biomass of primary consumers.(D) Only a small portion of the energy captured by producersis transferred to consumers.arrow_forward
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