BIOL 1200 Midterm: Exam 2 Study Guide Part 2
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Disadvantages: advantages: can help classify fossils, disadvantages: some species look morphologically similar, but are reproductively isolated. 3)phylogenetic species concept (psc: smallest group of individuals that share a common ancestor, forming one branch on the tree of life. Inconsistent with: cryptic species: a species that looks physically like another species, but the two cannot interbreed. This is consistent with the bsc and inconsistent with the. Which species concept(s) work" with respect to fossils: both the morphospecies and phylogenetic species concepts. Compare allopatry vs. sympatry: allopatry: physical separation, no gene flow, sympatry: populations within same geographic area, with gene flow. Are you ready to be tested on it: a researcher took fruit flies for one generation and gave them the same food source. The next generation, he split them, giving one starch and the other maltose. 40 generations later, he put them back together to find that flies chose to mate with like partners, showing the creation of a reproductive barrier.
