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5 Written questions

5 Matching questions

  1. species
  2. postzygotic barrier
  3. sympatric speciation
  4. polyploidy
  5. phylogenetic species concept
  1. a The formation of new species in populations that live in the same geographic area.
  2. b A reproductive barrier that prevents hybrid zygotes produced by two different species from developing into viable, fertile adults.
  3. c A chromosomal alteration in which the organism possesses more than two complete chromosome sets. It is the result of an accident of cell division.
  4. d A definition of species as the smallest group of individuals that share a common ancestor, forming one branch on the tree of life.
  5. e A population or group of populations whose members have the potential to interbreed in nature and produce viable, fertile offspring, but do not produce viable, fertile offspring with members of other such groups.

5 Multiple choice questions

  1. Evolutionary change below the species level; change in the allele frequencies in a population over generations.
  2. Offspring that results from the mating of individuals from two different species or from two true-breeding varieties of the same species.
  3. Evolutionary change above the species level. Examples of this type of change include the origin of a new group of organisms through a series of speciation events and the impact of mass extinctions on the diversity of life and its subsequent recovery.
  4. The formation of new species in populations that are geographically isolated from one another.
  5. An individual that has more than two chromosome sets that are all derived from a single species.

5 True/False questions

  1. speciationAn evolutionary process in which one species splits into two or more species.

          

  2. punctuated equilibriaIn the fossil record, long periods of apparent stasis, in which a species undergoes little or no morphological change, interrupted by relatively brief periods of sudden change.

          

  3. reinforcementA population or group of populations whose members have the potential to interbreed in nature and produce viable, fertile offspring, but do not produce viable, fertile offspring with members of other such groups.

          

  4. ecological species conceptDefinition of a species as a group of populations whose members have the potential to interbreed in nature and produce viable, fertile, offspring, but do not produce viable, fertile offspring with members of other such groups.

          

  5. allopolyploidAn individual that has more than two chromosome sets that are all derived from a single species.

          

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