5 Written Questions
5 Matching Questions
- reproductive isolation
- hybrid zone
- phylogenetic species concept
- 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 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.
- c A geographic region in which members of different species meet and mate, producing at least some offspring of mixed ancestry.
- d Offspring that results from the mating of individuals from two different species or from two true-breeding varieties of the same 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.
- 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.
- A reproductive barrier that impedes mating between species or hinders fertilization if interspecific mating is attempted.
- A chromosomal alteration in which the organism possesses more than two complete chromosome sets. It is the result of an accident of cell division.
5 True/False Questions
autopolyploid → An individual that has more than two chromosome sets that are all derived from a single species.
species → An evolutionary process in which one species splits into two or more species.
sympatric speciation → The formation of new species in populations that live in the same geographic area.
allopolyploid → A fertile individual that has more than two chromosome sets as a result of two different species interbreeding and combining their chromosomes.
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.