The largest unit within which gene flow can readily occur is a
  • species
  • Gene Flow
  • Sympatry
  • adaptive radiation
Which term is used to describe populations that live close enough to interbreed?
  • Gene Flow
  • Sympatry
  • species
  • autopolyploidy
According to the _____ model, evolution occurs in spurts; species evolve relatively rapidly then remain unchanged for long periods.
  • Adaptive radiation
  • a set of organisms with a unique genetic history
  • Haploid number of 6
  • punctuated equilbrium
_____ is rapid speciation under conditions in which there is little competition.
  • autopolyploidy
  • Adaptive radiation
  • all of these
  • Haploid number of 6
Which of the following factors would not contribute to allopatric speciation?
  • One species is nocturnal, and the other species is not.
  • They contain more than two haploid sets of chromosomes
  • Reinforcement is a type of natural selection.
  • Gene flow between the two populations is extensive
What would be the ploidy of the viable gametes produced by a tetraploid individual if nondisjunction of all chromosomes occurred in meiosis I?
  • Tetraploid
  • Gene Flow
  • Sympatry
  • autopolyploidy
Which of the following has been shown to cause speciation most rapidly?
  • They contain more than two haploid sets of chromosomes
  • Reinforcement is a type of natural selection.
  • Gene flow between the two populations is extensive
  • autopolyploidy
According to the phylogenetic species concept, what is a species?
  • a set of organisms with a unique genetic history
  • cannot mate and produce viable, fertile offspring
  • Reinforcement is a type of natural selection.
  • punctuated equilbrium
True or false? A mating between a tetraploid individual and a diploid individual produces biologically fit offspring.
  • True
  • False
Which of the following statements about reinforcement is true?
  • They contain more than two haploid sets of chromosomes
  • One species is nocturnal, and the other species is not.
  • Reinforcement is a type of natural selection.
  • Gene flow between the two populations is extensive
True or false? A flood that separates a population of frogs onto opposite sides of a lake is an example of a vicariance event that may result in allopatric speciation.
  • True
  • False
A population of birds colonizes an area in which the insects upon which they feed live inside trees. Which of the following events accounts for an observed increase in average beak size in the bird population over time?
  • Increased fitness of large-beaked birds, leading to natural selection
  • The populations will not be able to interbreed because they are different species.
  • Gene flow between the two populations is extensive
  • punctuated equilbrium
Which of the following statements about autopolyploid individuals is true?
  • One species is nocturnal, and the other species is not.
  • Gene flow between the two populations is extensive
  • Reinforcement is a type of natural selection.
  • They contain more than two haploid sets of chromosomes
A subset of a population of birds leaves its habitat on the mainland and colonizes a nearby island. The birds, after a period of time, become reproductively isolated. The island sinks and the population of birds that lived on the island returns to its original habitat. Which of the following statements about these bird populations is true?
  • They contain more than two haploid sets of chromosomes
  • Increased fitness of large-beaked birds, leading to natural selection
  • cannot mate and produce viable, fertile offspring
  • The populations will not be able to interbreed because they are different species.
True or false? The last ice age produced many different species mainly because populations dispersed and colonized new habitats.
  • True
  • False
Two animals are considered members of different species if they _____.
  • a set of organisms with a unique genetic history
  • Reinforcement is a type of natural selection.
  • cannot mate and produce viable, fertile offspring
  • Gene flow between the two populations is extensive
Mass extinctions create conditions that promote _____.
  • Haploid number of 6
  • adaptive radiation
  • all of these
  • autopolyploidy
What is genetic drift?
  • a set of organisms with a unique genetic history
  • They contain more than two haploid sets of chromosomes
  • A change in allele frequencies caused by random events
  • One species is nocturnal, and the other species is not.
The different finch species found on the Galápagos Islands probably arose as a result of _____.
  • Adaptive radiation
  • Haploid number of 6
  • punctuated equilbrium
  • autopolyploidy
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