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5 Written Questions

5 Matching Questions

  1. ecological species concept
  2. reinforcement
  3. morphological species concept
  4. biological species concept
  5. hybrid zone
  1. a A definition of species in terms of measurable anatomical criteria.
  2. b 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.
  3. c A 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.
  4. d A geographic region in which members of different species meet and mate, producing at least some offspring of mixed ancestry.
  5. e 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 Multiple Choice Questions

  1. The formation of new species in populations that live in the same geographic area.
  2. The existence of biological factors (barriers) that impede members of two species from producing viable, fertile offspring.
  3. A reproductive barrier that impedes mating between species or hinders fertilization if interspecific mating is attempted.
  4. Offspring that results from the mating of individuals from two different species or from two true-breeding varieties of the same 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. allopatric speciationThe formation of new species in populations that are geographically isolated from one another.

          

  2. phylogenetic species conceptA definition of species as the smallest group of individuals that share a common ancestor, forming one branch on the tree of life.

          

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

          

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

          

  5. postzygotic barrierA reproductive barrier that impedes mating between species or hinders fertilization if interspecific mating is attempted.

          

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