General Ecology: Habitat, Niche, and Ecological Equivalents
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Questions and Answers

What is the primary purpose of an indicator species in an ecosystem?

  • To serve as a food source for keystone species
  • To provide early warnings of ecosystem damage (correct)
  • To outcompete native species for resources
  • To increase the genetic diversity of the ecosystem

    • What is the term for the process by which a population's genetic makeup changes over time in response to environmental pressures?

  • Evolution (correct)
  • Population migration
  • Adaptation
  • Species succession

    • What is the consequence of losing a keystone species in an ecosystem?

  • Enhanced ecosystem resilience
  • Population crashes and extinctions of other species (correct)
  • Increased migration of nonnative species
  • Increased genetic diversity among remaining species

    • What is the term for a species that is introduced to an ecosystem by humans, either intentionally or unintentionally?

    <p>Nonnative species</p> Signup and view all the answers

    What is the relationship between a keystone species and the other species in its ecosystem?

    <p>The other species are dependent on the keystone species for survival</p> Signup and view all the answers

    What is the primary source of genetic variation that fuels the process of microevolution?

    <p>Mutations in DNA</p> Signup and view all the answers

    What is the term for the process by which new species are formed from ancestral species and other species are lost through extinction?

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

    What determines the physical characteristics that an organism inherits?

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

    What is the basis of variation in a species?

    <p>Different alleles</p> Signup and view all the answers

    Why is it extremely unlikely that another person with your precise genetic make-up has ever lived or ever will?

    <p>Because of the unique combination of alleles</p> Signup and view all the answers

    What is the primary difference between habitat and environment?

    <p>Habitat refers to physical location, while environment refers to all surrounding conditions</p> Signup and view all the answers

    Who is credited with the concept of ecological niche as an n-dimensional hypervolume?

    <p>G.E. Hutchinson</p> Signup and view all the answers

    What is the term for the full range of resources or habitat a species could exploit if there were no competition with other species?

    <p>Fundamental niche</p> Signup and view all the answers

    According to Eugene Odum, what is the analogy between habitat and niche?

    <p>Habitat is the address, niche is the profession</p> Signup and view all the answers

    What is the term for the resources or habitat a species actually uses?

    <p>Realized niche</p> Signup and view all the answers

    What is an example of a condition that defines an ecological niche?

    <p>Range of temperatures needed for survival</p> Signup and view all the answers

    What is a possible outcome when the fundamental niches of different species overlap significantly?

    <p>Suffer a sharp population decline</p> Signup and view all the answers

    What is the primary difference between interference competition and exploitation competition?

    <p>The mechanism of limiting access to the resource</p> Signup and view all the answers

    What is the outcome of two species competing for the same resource, according to the Competitive Exclusion Principle?

    <p>One species will either migrate, become extinct, or partition the resource</p> Signup and view all the answers

    What is an example of interference competition?

    <p>A plant releasing chemicals to inhibit the growth of nearby plants</p> Signup and view all the answers

    What is a consequence of exploitation competition?

    <p>Hampers growth, reproduction, or survival of other species</p> Signup and view all the answers

    What is the limitation on partitioning a shared resource, according to the Competitive Exclusion Principle?

    <p>The resource can only be partitioned a finite number of times</p> Signup and view all the answers

    What is the primary function of camouflage in defense mechanisms?

    <p>To blend in with the environment and avoid detection</p> Signup and view all the answers

    Which type of symbiosis involves a parasitic relationship where one species benefits and the other is neither harmed nor helped?

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

    What is the term for the defense mechanism where an animal breaks off a part of its body to distract a predator?

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

    Which type of mimicry involves a harmless species evolving to mimic a poisonous species?

    <p>Batesian mimicry</p> Signup and view all the answers

    What is the term for a species that has a symbiotic relationship with another species, where one species is dependent on the other for survival?

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

    Which type of parasite lives on the outer surface of its host?

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

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