BIOL 1202 Chapter : Ch24 The Origin Of Species
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Concept 24. 1: the biological species concept emphasizes reproductive isolation. Speciation: dependent on, reproductive isolation, genetic divergence. Two species of pine are found in the same habitat, but release pollen at different times during the year. This is an example of _____ isolation: temporal because it"s released at different times of the year. Is gametic isolation a prezygotic or postzygotic isolating mechanism: prezygotic. Concept 24. 2: speciation can take place with or without geographic separation. Speciation can occur in two ways: allopatric speciation, sympatric speciation. Which of the following is not considered a requirement for speciation to occur: high levels of gene flow among populations must occur. Allopatric speciation: other country , gene flow is interrupted or reduced when a population is divided into two or more geographically isolated subpopulations. Sympatric ( same country ) speciation: speciation that takes place in geographically overlapping populations. Plant species a has a diploid number of 12. Plant species b has a diploid number of 16.
