BSCI 1511 Chapter Notes - Chapter 24: Chromosome, Hybrid Zone, Ecological Niche

• School: Vanderbilt University
• Department: Biological Sciences
• Course: BSCI 1511
• Professor: Johnson Carl

Document Summary

Speciation: process by which one species splits into two or more species, produced tremendous diversity of life and yields new species that differ from existing ones. Microevolution: changes over time in allele frequencies in a population. Macroevolution: broad pattern of evolution above the species level. Species: group of populations whose members have the potential to interbreed in nature and produce viable, fertile offspring, but not with other species, no gene flow, based on separateness. Distinguishes a species by body shape and other structural features, can be subjective. Defined in terms of its ecological niche, sum of how members of species interact, if they live in different places then they are different, like different oaks. Emphasizes role of disruptive natural selection with adaptation. Smallest group of individuals that share a common ancestor, form one branch on the tree. Compare history between species and distinguish them into species.