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5 Written questions

5 Matching questions

  1. reproductive isolation
  2. autopolyploid
  3. hybrid zone
  4. phylogenetic species concept
  5. postzygotic barrier
  1. a A geographic region in which members of different species meet and mate, producing at least some offspring of mixed ancestry.
  2. b A reproductive barrier that prevents hybrid zygotes produced by two different species from developing into viable, fertile adults.
  3. c A definition of species as the smallest group of individuals that share a common ancestor, forming one branch on the tree of life.
  4. d An individual that has more than two chromosome sets that are all derived from a single species.
  5. e The existence of biological factors (barriers) that impede members of two species from producing viable, fertile offspring.

5 Multiple choice questions

  1. An evolutionary process in which one species splits into two or more species.
  2. The formation of new species in populations that are geographically isolated from one another.
  3. A definition of species in terms of measurable anatomical criteria.
  4. 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.
  5. 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.

5 True/False questions

  1. allopolyploidA fertile individual that has more than two chromosome sets as a result of two different species interbreeding and combining their chromosomes.

          

  2. polyploidyA fertile individual that has more than two chromosome sets as a result of two different species interbreeding and combining their chromosomes.

          

  3. speciesAn evolutionary process in which one species splits into two or more species.

          

  4. microevolutionEvolutionary 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.

          

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

          

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