BIOL 1030 Final: BIOL 1030 - Final Exam
Document Summary
Immigration and emigration also influence populations: when a population becomes crowded and resource competition increases, emigration often increases. Immigration and emigration are particularly important when a number of local populations are linked, forming a metapopulation. It also helps ecologists understand population dynamics and gene flow in patchy habitats: the logistic equation is deceptively simple. In insects, such as drosophila, the ubx gene is expressed in the abdomen. 541 - 542): fran ois jacob"s view of evolution harkens back to darwin"s concept of descent with modification, as new species form, novel and complex structures can arise as gradual modifications of ancestral structures. Limpets cling more tightly to their rock when a shadow falls on them, a behavioral adaptation that reduces the risk of being eaten. Limpets have had a long evolutionary history, demonstrating that their simple eyes are quite adequate to support their survival and reproduction. In the animal kingdom, complex eyes have evolved independently from such basic structures many times.
