5 Written questions
5 Matching questions
- phylogenetic species concept
- hybrid zone
- sympatric speciation
- punctuated equilibria
- a A definition of species as the smallest group of individuals that share a common ancestor, forming one branch on the tree of life.
- b A geographic region in which members of different species meet and mate, producing at least some offspring of mixed ancestry.
- 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.
- d The formation of new species in populations that live in the same geographic area.
- e An individual that has more than two chromosome sets that are all derived from a single species.
5 Multiple choice questions
- 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.
- 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.
- The formation of new species in populations that are geographically isolated from one another.
- Evolutionary change below the species level; change in the allele frequencies in a population over generations.
- The existence of biological factors (barriers) that impede members of two species from producing viable, fertile offspring.
5 True/False questions
polyploidy → An individual that has more than two chromosome sets that are all derived from a single species.
ecological species concept → 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.
hybrid → Offspring that results from the mating of individuals from two different species or from two true-breeding varieties of the same species.
allopolyploid → An individual that has more than two chromosome sets that are all derived from a single species.
macroevolution → 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.