BIOLOGY 1M03 Chapter Notes - Chapter 26: Dusky Seaside Sparrow, Species Problem, Phylogenetic Tree
13 May 2015
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Pg 498-500-503-505 & lecture 10 (continued from chapter 25) 2. difficult to apply in natural systems and hard to force closely-related populations to breed. Many species do hybridize but to a limited extent as observed in nature (e. g. 6% of european mammals have interspecific (different species) hybridization. : the morphospecies concept (msc) In this concept species are distinguished by differences size, shape and other morphological features. The concept is most useful for identifying species of bacteria, achaea or asexual eukaryotes (because these species cannot be defined by reproductive isolation from other species, distinctions between species are maintained by their adaptation to different ecological conditions). Chapter 26: reproductive isolation mechanisms: pre and post zygotic ; species. Concepts: biological, morpho-, ecological: the phylogenetic species concept, concept based on reconstructing the evolutionary history of populations -- a phylogenetic tree or tree of life. This tree can be constructed because all species are related by common ancestry.
