Conventional wisdom holds that the development of separate species happens quickly, most often when populations become separated by a geographical barrier." this is called speciation. "even if these groups meet again and manage to mate before diverging too far from one another, their offspring will be unfit and die out." this is described as hybrid ) sympatric; viabilityb) allopatric; fertilityc) sympatric; breakdownd) allopatric; breakdown

Sally, age 3 months, has a moist, red, vesicular rash on her cheeks, the backs of her hands, and her arms. her mother said sally was constantly trying to scratch the rash and often has difficulty sleeping. her father has a family history of allergic rhinitis and asthma. discussion questions. 1. review atrophic dermatitis from chapter 3 and discuss the pathophysiology of sally’s symptoms. 2. why is the father’s medical history significant, and what can sally expect as she grows up? 3. discuss the need to limit scratching, and describe practical methods to achieve this.