Performance expectationConstruct an explanation based on evidence for how natural selection leads to adaptation of populations.
Emphasis is on using data to provide evidence for how specific biotic and abiotic differences in ecosystems (such as ranges of seasonal temperature, long-term climate change, acidity, light, geographic barriers, or evolution of other organisms) contribute to a change in gene frequency over time, leading to adaptation of populations.
Every item written to HS-LS4-4 has to assess all three dimensions together, not the content alone. This is the structural change that made older practice material stop matching the exam.
Constructing Explanations and Designing Solutions
Phenomenon stimulus, connected items across the required types, answer key, rubric and figures drawn deterministically from a structured spec — in the format your students will sit.