NSES Content Standard Unifying Concepts and Processes:  
Form and function 
Grades K-12, page 119 

Form and function are complementary aspects of objects, organisms, and systems in the natural and designed world. The form or shape of an object or system is frequently related to use, operation, or function. Function frequently relies on form. Understanding of form and function applies to different levels of organization. Students should be able to explain function by referring to form and explain form by referring to function. 

No closely related benchmarks have been identified.