A scientist is studying the structural adaptations that occurred in a particular horse species over time. For several generations, the horses tended to have smaller teeth and longer toes. Then, there was a shift in the fossil record, and the horses tended to have larger teeth and shorter toes. What is the most likely cause for this shift in the horses' anatomy?

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.