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5 Written questions

5 Matching questions

  1. reproductive isolation
  2. allopatric speciation
  3. prezygotic barrier
  4. phylogenetic species concept
  5. macroevolution
  1. a A reproductive barrier that impedes mating between species or hinders fertilization if interspecific mating is attempted.
  2. b The formation of new species in populations that are geographically isolated from one another.
  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 The existence of biological factors (barriers) that impede members of two species from producing viable, fertile offspring.
  5. e 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.

5 Multiple choice questions

  1. 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.
  2. A fertile individual that has more than two chromosome sets as a result of two different species interbreeding and combining their chromosomes.
  3. 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. Offspring that results from the mating of individuals from two different species or from two true-breeding varieties of the same species.
  5. 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 True/False questions

  1. sympatric speciationThe formation of new species in populations that are geographically isolated from one another.

          

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

          

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

          

  4. biological 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. speciesA 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.