BIO 1002 Study Guide - Final Guide: Coping With, Trachea, Pharynx
Document Summary
Nausea tends to cause a pregnant mother to avoid foods that might contain chemicals harmful to a developing fetus. Part of the "fight or flight" defense mechanism. Pathogens such as bacteria and viruses are constantly invading our bodies. They have a much shorter generation time than humans and evolve much more rapidly. We will never evolve perfect defenses against them. Many bacteria are now resistant to antibiotics since they rapidly evolve antibiotic- resistant strains of bacteria. Deadly pathogen that can either be virulent or benign. >virulent: strains multiply rapidly and make people sick faster. >benign: they multiply slowly and allow people to live with the virus for a long time. We"ve retained some traits and behaviors that might not make much sense in our modern environment, but natural selection has not yet eliminated them. Obesity is a severe health risk among many americans.
