BIOLOGY 152 Lecture 8: Evolution Chapter 8 Sexual Selection and Speciation (Bio 152)
Document Summary
Male will build elaborate houses with decorations, which uses to woo a female bowerbird. Female bird will survey the houses and choose the one they found most attractive: ss has driven the formation of this behavior. 8. 2 species: biological species concept (same-species organism will mate together, doesn"t work the member of other species, phylogenic species concept: species = clades that biologists choose to assign to the species rank for practical reasons. Intrinsic reproductive isolation happen when two lineages different species stop reproduce with one another even they encounter with each other: extrinsic isolation causes by geographical isolation. Biological species concept: species are defined by the ability of their measures to reproduce with one another and to be unable to reproduce with the members of other species. Phylogenetic species concept: species are clades, like other in the taxonomic hierarchy (genera, subspecies, etc. ), that biologists have chosen to assign to the species rank for practical reasons.
