BIOL 1001 Lecture 16: March 1
Document Summary
Bio 1001 march 1st, 2017 speciation. Question 1: three populations of birds look very similar but the males have territorial songs that sound different. What function would this difference in song likely serve if two of the populations came into contact? (that is how could it potentially act to keep the two populations act to keep the two populations apart?) Answer 1: it is a prezygotic isolating mechanism (before fertilization occurs) Both prezygotic and postzygotic help speciation and prevent gene pools from mixing. Answer 2: mechanical isolation is two organisms that are pollinated by different insects. Some bugs cannot fit into plants therefore it cannot take enough pollen to transfer gametes: evolved. Species that have a penis that cannot fit into female genitals of different species. Volume is where you take your heat, surface areas is where you lose your heat. So as you move north, more volume than surface area. No such thing as subspecies in biological species concept.
