Clarification Statement - S.4.LS.1.1.CS:
Examples of structures could include thorns, stems, roots, colored petals, heart, stomach, lung, brain, and skin.

Assessment Boundary - S.4.LS.1.1.AB:
Assessment is limited to macroscopic structures within plant and animal systems.

Science and Engineering Practices - 3-5.SEP7.1:
Construct an argument with evidence, data, and/or a model.

Disciplinary Core Ideas - S.4.LS.1.1.DCI:
LS1.A: Structure and Function •Plants and animals have both internal and external structures that serve various functions in growth, survival, behavior, and reproduction.

Crosscutting Concepts - CC3.2:
A system can be described in terms of its components and their interactions.