Ch 9: Interactions in the environment
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Questions and Answers

What is predation?

  • A process of reproduction in ecosystems
  • Competition for resources within an ecosystem
  • A symbiotic relationship between two organisms
  • The act of preying on another animal for energy acquisition (correct)

    • What is competition in the context of ecology?

  • The process of mutual sacrifice for ecological conservation
  • Individuals or species fighting for limited resources (correct)
  • Social interactions between organisms of the same species
  • Mutual benefit between two different species

    • What is the main difference between intraspecific competition and interspecific competition?

  • Intraspecific involves different species, while interspecific involves the same species
  • Intraspecific is between different species, while interspecific is within the same species (correct)
  • Intraspecific involves fighting for mates, while interspecific involves fighting for food
  • Intraspecific influences population sizes, while interspecific influences community structure

    • How do predators influence ecosystem dynamics?

    <p>By regulating prey populations and influencing species diversity</p> Signup and view all the answers

    What is the outcome of competitive exclusion according to the competitive exclusion principle?

    <p>One species outcompetes the other, potentially leading to extinction</p> Signup and view all the answers

    What is the role of predators in the predator-prey curve?

    <p>Resulting in delayed population increase of predators</p> Signup and view all the answers

    How can species coexist despite competition for the same resources?

    <p>Through resource partitioning or occupying different ecological niches</p> Signup and view all the answers

    How are predator-prey interactions depicted?

    <p>By illustrating population fluctuations over time on a graph</p> Signup and view all the answers

    What type of relationship benefits both species involved?

    <p>Mutualism</p> Signup and view all the answers

    What happens as prey numbers increase on a predator-prey curve?

    <p>Predator numbers immediately increase</p> Signup and view all the answers

    In a commensalistic relationship, how does one organism benefit?

    <p>Without affecting the other organism</p> Signup and view all the answers

    Which of the following describes a predator in an ecosystem?

    <p>A heterotrophic organism that actively hunts and kills other organisms</p> Signup and view all the answers

    Why do prey numbers eventually decline on the predator-prey curve?

    <p>Increased predation and environmental resistance</p> Signup and view all the answers

    Which of the following is an example of a parasitic relationship?

    <p>Tapeworms and their hosts</p> Signup and view all the answers

    What is the primary function of predators in an ecosystem?

    <p>To regulate prey populations</p> Signup and view all the answers

    What is the primary outcome of mutualistic relationships?

    <p>Both species benefit</p> Signup and view all the answers

    What is the effect of competition among predators on prey populations?

    <p>It leads to a decrease in prey numbers</p> Signup and view all the answers

    How do interactions such as mutualism and parasitism influence the ecosystem?

    <p>They significantly alter ecosystem dynamics</p> Signup and view all the answers

    What term describes the outcome where one species outcompetes another, potentially leading to the latter's extinction?

    <p>Competitive Exclusion</p> Signup and view all the answers

    In a predator-prey interaction, what happens if prey numbers decline significantly?

    <p>Predator numbers decrease subsequently</p> Signup and view all the answers

    What is the primary role of predators in an ecosystem?

    <p>Regulating prey populations by hunting and consuming other organisms</p> Signup and view all the answers

    How are predator-prey interactions often represented?

    <p>With predator-prey curves</p> Signup and view all the answers

    What term is used to describe the act of one organism hunting, killing, and consuming another for energy acquisition?

    <p>Predation</p> Signup and view all the answers

    What typically happens to predator populations after a significant increase in prey numbers?

    <p>They experience a delayed increase</p> Signup and view all the answers

    What describes the dynamics of biological systems where two species interact?

    <p>Predator-prey curve</p> Signup and view all the answers

    What is the role of predators in shaping population sizes within an ecosystem?

    <p>Regulating prey populations</p> Signup and view all the answers

    In a predator-prey relationship, why do prey numbers decline eventually?

    <p>As a result of predation and environmental resistance</p> Signup and view all the answers

    Which of the following is a key terminology related to predator-prey interactions?

    <p>Predator-prey curve</p> Signup and view all the answers

    What is the outcome of predator-prey cycles in terms of population fluctuations?

    <p>Dynamic population fluctuations over time</p> Signup and view all the answers

    Which role do predators play in ecosystem dynamics according to the text?

    <p>Regulating prey numbers</p> Signup and view all the answers

    What term describes the scenario where one species eliminates another through competition for the same limited resources?

    <p>Competitive exclusion</p> Signup and view all the answers

    In an ecosystem, what type of relationship involves one species benefiting without affecting the other?

    <p>Commensalism</p> Signup and view all the answers

    Which of the following describes competition between individuals of the same species?

    <p>Intraspecific competition</p> Signup and view all the answers

    What outcome occurs when two species coexist by using different resources or occupying different ecological niches?

    <p>Resource partitioning</p> Signup and view all the answers

    Which type of interaction involves one organism benefiting at the expense of the other?

    <p>Parasitism</p> Signup and view all the answers

    When two different species engage in competition for limited resources, what principle states that one species will outcompete the other?

    <p>Competitive exclusion principle</p> Signup and view all the answers

    What is the term for a close, long-term interaction between individuals of different species?

    <p>Symbiotic relationship</p> Signup and view all the answers

    Within a symbiotic relationship, which type involves both species benefiting?

    <p>Mutualism</p> Signup and view all the answers

    What does competitive exclusion lead to within a population of species?

    <p>Extinction</p> Signup and view all the answers

    In a mutualistic relationship, which outcome is observed between two interacting species?

    <p>Both species benefiting</p> Signup and view all the answers

    What factor contributes to the delayed increase in predator populations in a predator-prey curve?

    <p>Reproduction rates</p> Signup and view all the answers

    Which term best describes an organism preying on another for energy acquisition in an ecosystem?

    <p>Predation</p> Signup and view all the answers

    What is the main purpose of a predator in an ecosystem?

    <p>Regulating prey populations</p> Signup and view all the answers

    What is a key result of predator-prey interactions on species diversity within an ecosystem?

    <p>Higher species diversity</p> Signup and view all the answers

    Which of the following disrupts the predator-prey balance in an ecosystem?

    <p>Environmental disturbances</p> Signup and view all the answers

    Why do predator populations experience a delayed increase in response to rising prey numbers?

    <p>Limitations in reproduction rates</p> Signup and view all the answers

    In ecosystem dynamics, what role does predation play in shaping community structure?

    <p>Shaping population distributions</p> Signup and view all the answers

    What concept describes the detailed dynamics of biological systems involving predator-prey interactions?

    <p>Predator-prey curve</p> Signup and view all the answers

    How does predation impact population sizes within an ecosystem?

    <p>Regulating population numbers</p> Signup and view all the answers

    Which aspect of the predator-prey curve leads to dynamic population fluctuations over time?

    <p>Initial increase in prey populations</p> Signup and view all the answers

    What term describes the process whereby one species outcompetes another, potentially leading to the latter's extinction?

    <p>Competitive Exclusion</p> Signup and view all the answers

    Which type of competition occurs within members of the same species?

    <p>Intraspecific Competition</p> Signup and view all the answers

    What term is used for the process where species may coexist by utilizing different resources or occupying different ecological niches?

    <p>Resource Partitioning</p> Signup and view all the answers

    What is the relationship where one organism benefits without affecting the other known as?

    <p>Commensalism</p> Signup and view all the answers

    Which type of relationship involves one organism benefiting at the expense of another species?

    <p>Parasitism</p> Signup and view all the answers

    What interaction describes the close, long-term relationship between individuals of different species?

    <p>Symbiotic Relationship</p> Signup and view all the answers

    In which type of relationship do both species benefit mutually?

    <p>Mutualism</p> Signup and view all the answers

    Which type of relationship involves competition between two or more different species?

    <p>Interspecific Competition</p> Signup and view all the answers

    What is the term used to describe social interaction between organisms fighting for dominance over the same limited resources?

    <p>Competition</p> Signup and view all the answers

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