For Biology students in the College of Creative Studies at the University of California Santa Barbara.
Friday, March 13, 2015
A follow up to my presentation. We think about evolution happening slowly over long periods of time, but (relatively) large changes can happen over small periods of time as well with a strong selection pressure. Over the past 100 years, humans selectively breeding for certain traits have caused morphological changes to dog breeds.
Many of these changes would not have persisted without human selection because they have large fitness costs such as frequent overheating and a variety of diseases.