5 Written questions
5 Matching questions
- ecological species concept
- punctuated equilibria
- phylogenetic species concept
- morphological species concept
- a 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.
- b 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.
- c A definition of species in terms of measurable anatomical criteria.
- d 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.
- e A definition of species as the smallest group of individuals that share a common ancestor, forming one branch on the tree of life.
5 Multiple choice questions
- The formation of new species in populations that are geographically isolated from one another.
- A geographic region in which members of different species meet and mate, producing at least some offspring of mixed ancestry.
- An individual that has more than two chromosome sets that are all derived from a single species.
- A chromosomal alteration in which the organism possesses more than two complete chromosome sets. It is the result of an accident of cell division.
- A reproductive barrier that impedes mating between species or hinders fertilization if interspecific mating is attempted.
5 True/False questions
postzygotic barrier → A reproductive barrier that prevents hybrid zygotes produced by two different species from developing into viable, fertile adults.
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 below the species level; change in the allele frequencies in a population over generations.