Competition Knowledge-Based Download PDF

Questions

1. 1.

   When two competing species with overlapping niches occur sympatrically, natural selection often drives the evolutionary divergence of morphological or behavioral traits related to resource use. Which term describes this evolutionary phenomenon driven by interspecific competition?

   • A) Character displacement
   • B) Competitive release
   • C) Ecological niche conservatism
   • D) Commensalism
2. 2.

   In community ecology, interspecific competition frequently prevents a species from utilizing all the abiotic and biotic resources it is physiologically capable of exploiting. What term describes the actual set of environmental conditions and resources a species occupies and utilizes in the presence of competing species?

   • A) Realized niche
   • B) Fundamental niche
   • C) Ecological guild
   • D) Trophic level
3. 3.

   Which form of competition occurs when organisms interact directly through physical aggression, territorial defense, or chemical inhibition to actively prevent rivals from accessing a shared resource?

   • A) Exploitative competition
   • B) Apparent competition
   • C) Interference competition
   • D) Scramble competition
4. 4.

   Resource partitioning enables ecologically similar species to coexist stably within the same habitat primarily through which mechanism?

   • A) Accelerating the local extinction of the weaker competitor through direct physical confrontation
   • B) Expanding the fundamental niches of both competing populations beyond their physiological tolerances
   • C) Eliminating the cellular and metabolic requirements for the limiting environmental resources
   • D) Subdividing shared resources across different spatial microhabitats, times of activity, or feeding strategies
5. 5.

   According to the competitive exclusion principle, what is the expected long-term outcome when two distinct species compete for the exact same limiting resource in a stable environment?

   • A) Both species will maintain equal and stable population sizes indefinitely while sharing the identical niche.
   • B) The subordinate species will immediately undergo directed mutations to switch to an entirely different food source.
   • C) Both species will interbreed to form a single hybrid population that uses the resource more efficiently.
   • D) The species that utilizes the limiting resource more efficiently will eliminate the other through local extinction or drive niche differentiation.