BI111 Chapter Notes - Chapter 5: Multicellular Organism, Photosynthesis, Half-Life
Document Summary
Deine the biological species concept: scienists categorize organisms into species based on their geneic, physical and behavioural characterisics. The most common method for species difereniaion is the biological species concept, which deines a species as a populaion of sexually reproducing organisms that interbreed to produce viable, ferile ofspring. List alternaive species concepts: morphological, phylogeneic and ecological species concepts emphasize other systems of species classiicaion. Explain the role of reproducive isolaion in the evoluion of species: when a part of a populaion of organisms becomes isolated from its parent populaion, mutaion geneic drits and natural selecion occur independently in two populaions. Over ime, this may lead to the reproducive isolaion of the two populaions, resuling in the formaion of new species. Disinguish between pre-zygoic and post-zygoic barriers: isolaion that keeps gametes from fusing occurs through pre-zygoic barriers, such as behavioural diferences that prevent organisms from the two populaions from recognizing each other.
