5 Written questions
5 Matching questions
- allopatric speciation
- morphological species concept
- phylogenetic species concept
- a An evolutionary process in which one species splits into two or more species.
- b The formation of new species in populations that are geographically isolated from one another.
- c A 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.
- d A definition of species as the smallest group of individuals that share a common ancestor, forming one branch on the tree of life.
- e A definition of species in terms of measurable anatomical criteria.
5 Multiple choice questions
- A fertile individual that has more than two chromosome sets as a result of two different species interbreeding and combining their chromosomes.
- 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.
- 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 existence of biological factors (barriers) that impede members of two species from producing viable, fertile offspring.
5 True/False questions
biological species concept → 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.
macroevolution → Evolutionary change below the species level; change in the allele frequencies in a population over generations.
hybrid → Offspring that results from the mating of individuals from two different species or from two true-breeding varieties of the same 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.
postzygotic barrier → A reproductive barrier that impedes mating between species or hinders fertilization if interspecific mating is attempted.