WA.4. Life Science
LS3. Biological Evolution
6-8.LS3. Inheritance, Variation, and Adaptation: In prior years, students learned that differences in inherited characteristics might help organisms survive and reproduce. In grades 6-8 students learn how the traits of organisms are passed on through the transfer of genetic information during reproduction and how inherited variations can become adaptations to a changing environment. Sexual reproduction produces variations because genes are inherited from two parents. Variations can be either physical or behavioral, and some have adaptive value in a changing environment. In the theory of biological evolution the processes of inheritance, variation, and adaptation explain both the diversity and unity of all life.
6-8.LS3A. Students know that the scientific theory of evolution underlies the study of biology and explains both the diversity of life on Earth and similarities of all organisms at the chemical, cellular, and molecular level. Evolution is supported by multiple forms of scientific evidence.
6-8.LS3A.1. Students are expected to explain and provide evidence of how biological evolution accounts for the diversity of species on Earth today.
6-8.LS3E. Students know that adaptations are physical or behavioral changes that are inherited and enhance the ability of an organism to survive and reproduce in a particular environment.
6-8.LS3E.1. Students are expected to give an example of a plant or animal adaptation that would confer a survival and reproductive advantage during a given environmental change.
6-8.LS3F. Students know that extinction occurs when the environment changes and the adaptive characteristics of a species, including its behaviors, are insufficient to allow its survival.
6-8.LS3F.1. Students are expected, to given an ecosystem, predict which organisms are most likely to disappear from that environment when the environment changes in specific ways.