BIOSC 0160 Midterm: Exam 3 Notes.docx
Document Summary
By what mechanism does adaptive evolution occur: lamarck felt needs , darwin natural selection. Darwin"s reasoning about mechanism part 2: ernst mayr. Short definition of natural selection: natural selection is a process in which individuals differ in survival/reproduction, that difference resulting from the possession of alternate, heritable forms of a trait. Species and populations: species: a nature kind , species: group of populations whose individuals can interbreed, population: group of conspecifics (member of the same species) living in a particular location. Evolving populations: microevolution generation-to-generation change in a population"s frequency of alleles or genotypes. Vi: can result in a decrease in fitness within other contexts (e. g. , predation) Bio 0160: what is a species, biological species concept. Bio 0160: fossil evidence, good fossil sequences document anagenesis (e. g. marine bivalves, bivalves are mollusk (clams, mussels, observed anagenesis, direct observations frequent, reviewed peppered moth, cliff swallows, and medium ground finch examples.
