Practise AP Biology 7.4.C questions by using allele-frequency and heritable-phenotype data as evidence that a population has evolved.
Twenty million years ago the Caribbean Sea and Pacific Ocean were connected, and water flowed freely between the two bodies of water. Many of the same marine species were found in both areas. Over millions of years, the land referred to as the Isthmus of Panama formed, eventually closing off the connection between the Caribbean Sea and Pacific Ocean and creating two separate bodies of water. The ecology of these two marine habitats was dramatically altered by this land formation. The warmer Caribbean water could no longer flow west, so the Pacific water cooled and became more nutrient-rich, while the Caribbean water became warmer.
Describe the genetic evidence that evolution is occurring in a population.
Describe the genetic evidence that evolution is occurring in a population.
Examples of acceptable responses may include the following:
- There are changes in allele/gene frequencies.
- There are heritable changes in phenotypes.
1 point