Speciation can occur when two populations of a species become separated from each (ther. What is the best explanation for why speciation occurs?
OA. One of the populations tends to begin breeding with a different species and produces sterile offspring.
OB. Populations of the same species continue to interbreed even after they have been separated.
OC. One of the populations loses the ability to produce viable offspring and becomes extinct.
OD
Populations of the same species living in different environments tend to change in different ways.

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.