BSC 101 Exam #2 Questions with correct answers

BSC 101 Exam #2 Questions with correct answers Macro-evolution - The descent of different species from a common ancestor over many generations. Examines changes in allele frequencies within a species. Biological fitness - The degree to which an individual can reproduce and have its genes represented in the next generation. When can a mutation happen? - If DNA fails to copy correctly and environmental factors (mutagens) can as well. What are the only mutations that matter to evolution? - Those that can be passed on to offspring. What is biological species? - A group of organisms that are able to mate and produce viable/fertile offspring. For example, a mule that is a sterile horse-donkey hybrid. Speciation - Changes in allele frequencies cause some individuals of a species to be unable to mate with other individuals of that same species. When one species diverges into two because a portion of the parent species becomes unable to reproduce with the rest of the species. May be allopatric or sympatric. What happens with allopatric speciation during macroevolution? - 1. Populations bec