Humans have a large impact on the environment—pollution, land use change, climate change, etc. We are just beginning to realize that we also cause evolutionary change, and the consequences of this. Ecology and evolution are strongly interconnected. What Is Evolution? Evolution can be viewed as genetic change over time or as a process of descent…
What Darwin Observed Darwin sent specimens collected on his voyage back to England to be examined by experts Fossils collected were confirmed to be large versions of the present-day sloth and armadillo The Galapagos Island’s bird specimens were in fact many different species of birds Darwin originally thought they were just variations of the same…
Darwin’s Five Observations More young are produced than survive Individuals vary in their characteristics Some characteristics are better than others These characteristics are inheritable Long periods of time are available Darwin’s Two Major Points Many species of organisms presently inhabiting the earth are descendants of ancestral species that were different from modern species The mechanism…
Theory Who? Main Concepts Relationships Related Theoretical Perspective Natural Selection Evolutionary psychologists -women prefer to mate with men who would be good fathers and who would stay around to be good providers -men preferred to mate with women who could bear healthy babies who could feed their children -could apply to any given relationship;…
Evolution describes the changes in the gene pool of a species over time. These changes are the results of mutations, natural selection and genetic drift. Often populations produce more offspring than the environment can support; in other words, they often exceed the carrying capacity. Over-production of offspring leads to intraspecific competition and survival of the…
Table 1: Amount of Light/ Dark moths remaining before, during, after industrial revolution Tree Bark # of Melanic Moths Remaining # of Light Moths Remaining % of Melanic Moths Remaining (/30) % of Light Moths Remaining (/30) Light (Pre-Industrial Revolution) 1 13 13 43% 43% 2 10 15 33% 50% 3 8 16 27% 53%…