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5 Written questions

5 Matching questions

  1. phylogenetic species concept
  2. hybrid zone
  3. autopolyploid
  4. sympatric speciation
  5. punctuated equilibria
  1. a A definition of species as the smallest group of individuals that share a common ancestor, forming one branch on the tree of life.
  2. b A geographic region in which members of different species meet and mate, producing at least some offspring of mixed ancestry.
  3. c In 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.
  4. d The formation of new species in populations that live in the same geographic area.
  5. e An individual that has more than two chromosome sets that are all derived from a single species.

5 Multiple choice questions

  1. Definition 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.
  2. In evolutionary biology, a process in which natural selection strengthens prezygotic barriers to reproduction, thus reducing the chances of hybrid formation. Such a process is likely to occur only if hybrid offspring are less fit than members of the parent species.
  3. The formation of new species in populations that are geographically isolated from one another.
  4. Evolutionary change below the species level; change in the allele frequencies in a population over generations.
  5. The existence of biological factors (barriers) that impede members of two species from producing viable, fertile offspring.

5 True/False questions

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

          

  2. ecological species conceptA definition of species in terms of ecological niche, the sum of how members of the species interact with the nonliving and living parts of their environment.

          

  3. hybridOffspring that results from the mating of individuals from two different species or from two true-breeding varieties of the same species.

          

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

          

  5. macroevolutionEvolutionary 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.

          

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