Question

Can you complete this concept map that reviews some key ideas about species and speciation?

Answer 1

Speciation is the study of how species as a whole change and when they form the new species. Speciation has four geographic modes: allopatric, peripatric, parapatric, and sympatric. Allopatric speciation occurs when a species population geographically splits, and two isolated population undergo a divergence in genotype or phenotype, therefore resulting in two new species. In peripatric speciation, two populations of the same species are isolated, one becomes smaller than the other. The smaller population has a specific trait that allows it to live in its habitat, and that gene develops into what becomes a new species. So, the two species are not able to reproduce with each other. Genetic drift plays a large role in this process. Parapatric speciation occurs when a population is partially seperated, and the two populations do inter-breed. Over the time period, the differences between the two species grow, and therefore preventing inter-breeding. Sympatric speciation occurs when two or more species are evolving but sharing the same space. This is happened because of the mating preferences.