BIOLOGY
12th Edition
ISBN: 9781260169614
Author: Raven
Publisher: RENT MCG
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Textbook Question
Chapter 55, Problem 3A
a. always occurs when species have identical niches.
b. may not occur in the presence of a predator, which reduces prey
c. results in the fundamental and realized niches being the same.
d. is more common in herbivores than carnivores.
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Students have asked these similar questions
Akeystone 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.
The average niche breadth for space resources is wide for species of barnacles in an intertidal community. This pattern would indicate…
a.
niche overlap is low
b.
a greater level of competition between species
c.
coexistence via resource partitioning
d.
a greater number of species in the community
e.
high levels of disturbance
Under what conditions can the realized niche of a species exceed its fundamental niche?
a. never
b. when the species is transported out of its natural geographic range
c. when the species experiences mutualistic interactions with another species
d. when the species is relieved of competition with another species
e. all of the above (except for never)
Chapter 55 Solutions
BIOLOGY
Ch. 55.1 - Prob. 1LOCh. 55.1 - Prob. 2LOCh. 55.2 - Prob. 1LOCh. 55.2 - Prob. 2LOCh. 55.2 - Explain how the presence of other species can...Ch. 55.3 - Prob. 1LOCh. 55.3 - Prob. 2LOCh. 55.4 - Explain the different forms of symbiosis.Ch. 55.4 - Prob. 2LOCh. 55.4 - Explain how the occurrence of one ecological...
Ch. 55.5 - Prob. 1LOCh. 55.5 - Describe how early colonizers may affect...Ch. 55.5 - Prob. 3LOCh. 55 - Prob. 1DACh. 55 - Prob. 2DACh. 55 - Prob. 1IQCh. 55 - Prob. 2IQCh. 55 - Prob. 3IQCh. 55 - Prob. 4IQCh. 55 - Prob. 5IQCh. 55 - Prob. 6IQCh. 55 - Prob. 7IQCh. 55 - Studies that demonstrate that species living in an...Ch. 55 - Prob. 2UCh. 55 - According to the idea of coevolution between...Ch. 55 - In order for mimicry to be effective in protecting...Ch. 55 - Which of the following is an example of...Ch. 55 - A species whose effect on the composition of a...Ch. 55 - When a predator preferentially eats the superior...Ch. 55 - Prob. 8UCh. 55 - Prob. 1ACh. 55 - The presence of a predatory species a. always...Ch. 55 - Resource partitioning by sympatric species a....Ch. 55 - Parasitism differs from predation because a. the...Ch. 55 - The presence of one species (A) in a community may...Ch. 55 - Competition is traditionally indicated by...Ch. 55 - Refer to figure 56.9. If the single prey species...Ch. 55 - Prob. 3SCh. 55 - Refer to figure 56.7. Examine the pattern of beak...Ch. 55 - Is it possible that some species function together...
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- The elimination of predators by humans a. will cause its prey to experience exponential growth until new predators arrive or evolve. b. will lead to an increase in the carrying capacity of the environment. c. may increase the population size of a prey species if that prey’s population was being regulated by predation from the predator. d. will lead to an Allee effect.arrow_forwardWhat are some conditions that might lead to a mutualistic organism becoming a predator/parasite. Select all that apply. A. Mutualistic nitrogen fixation bacteria might reduce the competitive ability of their host plants in environments with high N availability, because of the energetic costs to the plants of supporting the bacteria B. none of the above C. Mutualistic nitrogen fixing bacteria can become parasites in soil with low nitrogen availability because of the energy costs to the plant of supporting the bacteria D. A mutualist fish species that feeds on ectoparasites of another fish species, might switch to feeding/removing important host tissue or secretions when ectoparasite abundance is too low.arrow_forwardA feeding relationship that proceeds from algae to a fish, then to a fisherman, and then to a shark is _____. a. a food chain b. a food web c. a and barrow_forward
- 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) low species richness (c) pronounced intraspecific competition (d) coevolution of predatorprey strategies (e) resource partitioningarrow_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_forwardThe fact that H/G peoples invariably exploit only some of the potential food resources available to them can be explained by a. the carrying capacity of their territory b. their close connection to local markets and agriculturalists c. optimal foraging theory d. their marriage practices controlling land use rights;arrow_forward
- Competitive exclusion occurs under the following conditions: a. when fundamental niches overlap and competition is asymmetric b. when realized niches overlap and competition is asymmetric c. when fundamental niches overlap and competition is symmetric d. when realized niches overlap and competition is symmetric e. when competition is excluded because niches do not overlaparrow_forward1. Which of the following is most true about interspecific competition? a. It involves interaction between individuals of the same species. b. It is the greatest between organisms that occupy different ecological niches. c. It can be easily demonstrated to occur in natural environments. d. It is the greatest between organisms that physically share similar ecological niches. e. It increases with resource partitioning. 2. Which of the following is true in relation to predation: a. The predator is negatively affected and the prey is positively affected. b. The predator population always increases and the prey population always decreases in size. c. The predator-prey population cycle exhibits a sinusoidal pattern on a graph. d. The prey can never be protected against its predator. e. The snowshoe hare and lynx cycling study demonstrated that predator-prey cycling is not influenced by any other factors. 3. Water that is used in the production of a good or a service, is referred to as: a)…arrow_forwardThe population cycles of many prey species are often generated by predators anda. mimicry.b. food plants.c. weather patterns.d. water availability.arrow_forward
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