Biological Definition of Species
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Questions and Answers

What type of speciation involves speciation occurring within a parent species while remaining in one location?

  • Parapatric speciation
  • Allopatric speciation
  • Peripatric speciation
  • Sympatric speciation (correct)

In sympatric speciation, why is it less likely to have more than two species formed at one time?

  • It lacks environmental support
  • It is biologically implausible
  • It is conceptually unlikely (correct)
  • It is not genetically possible

What mechanism prevents the free-flow of alleles in geographically discontinuous populations?

  • Gene flow (correct)
  • Natural selection
  • Mutation
  • Genetic drift

What leads to the divergence in allele frequencies at numerous genetic loci between geographically separate populations?

<p>Genetic drift (B)</p> Signup and view all the answers

What factor plays a significant role in causing natural selection to favor divergent adaptations in geographically separated populations?

<p>Predators and competitors (A)</p> Signup and view all the answers

According to the passage, what is the biological definition of a species?

<p>A group of actually or potentially interbreeding individuals (A)</p> Signup and view all the answers

What does the passage suggest about hybrids between similar species?

<p>The presence of hybrids suggests the speciation process may not be complete. (D)</p> Signup and view all the answers

According to the passage, what are the two broad categories of mechanisms for speciation?

<p>Geographic separation and reproductive isolation (C)</p> Signup and view all the answers

What did Darwin envision the process of speciation to be?

<p>A branching event, as diagrammed in On the Origin of Species (B)</p> Signup and view all the answers

What is required for speciation to occur, according to the passage?

<p>Reproductive isolation of two new populations (A)</p> Signup and view all the answers

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