For hundreds of years, humans have selectively bred species. Farmers selected crops with the best traits: tomatoes that were the most plump and full of flavor, lettuce with the largest leaves, flowers with the best color. Broccoli, cauliflower, cabbage, and kale all originated from a single form of wild mustard weed. Additionally, humans helped to develop modern dog breeds by breeding those with the most desirable traits. These are examples of selective breeding, a form of causing a species to change and one form of evidence for biological evolution: the change of species over time. This unit will examine the statistics of traits in a population, evidence for biological evolution, and what can influence the survival of an individual as well as a species.
Inheritance & Evolution
Communicate scientific information that common ancestry and biological evolution are supported by multiple lines of empirical evidence (HS-LS4-1)
Evaluate the evidence supporting claims that changes in environmental conditions may result in: (1) increases in the number of individuals of some species, (2) the emergence of new species over time, and (3) the extinction of other species (HS-LS4-5)
Evaluate the evidence for the role of group behavior on individual and species’ chances to survive and reproduce. (HS-LS2-8)