DE.7. Diversity and Continuity of Living Things
7.2. Diversity and Evolution
Enduring Understanding: The diversity and changing of life forms over many generations is the result of natural selection, in which organisms with advantageous traits survive, reproduce, and pass those traits to offspring.
7.2.A. The Earth's present day species evolved from earlier, distinctly different species. Many thousands of layers of sedimentary rock provide evidence for the long history of the Earth and for the long history of changing life forms whose remains are found in the rocks. More recently deposited rock layers are more likely to contain fossils resembling existing species. (Level: Compact)
7.2.B. Natural selection is the process by which some individuals with certain traits are more likely to survive and produce greater numbers of offspring than other organisms of the same species. Competition for resources and mates and conditions in the environment can affect which individuals survive, reproduce and pass their traits on to future generations. (Level: Essential)
8.1. Interactions within the Environment
Enduring Understanding: Organisms and their environments are interconnected. Changes in one part of the system will affect other parts of the system.
8.1.H. Organisms within an ecosystem may interact symbiotically through mutualism, parasitism, and commensalism. (Level: Important)