5 Written questions
5 Matching questions
- reproductive isolation
- hybrid zone
- phylogenetic species concept
- postzygotic barrier
- a A geographic region in which members of different species meet and mate, producing at least some offspring of mixed ancestry.
- b A reproductive barrier that prevents hybrid zygotes produced by two different species from developing into viable, fertile adults.
- c A definition of species as the smallest group of individuals that share a common ancestor, forming one branch on the tree of life.
- d An individual that has more than two chromosome sets that are all derived from a single species.
- e The existence of biological factors (barriers) that impede members of two species from producing viable, fertile offspring.
5 Multiple choice questions
- An evolutionary process in which one species splits into two or more species.
- The formation of new species in populations that are geographically isolated from one another.
- A definition of species in terms of measurable anatomical criteria.
- 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.
- 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
allopolyploid → A fertile individual that has more than two chromosome sets as a result of two different species interbreeding and combining their chromosomes.
polyploidy → A fertile individual that has more than two chromosome sets as a result of two different species interbreeding and combining their chromosomes.
species → An evolutionary process in which one species splits into two or more species.
microevolution → 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.
hybrid → Offspring that results from the mating of individuals from two different species or from two true-breeding varieties of the same species.