How does the structure of
[a structure] make its
function possible? The
specific features and what
each buys — plus what a badly
designed version would fail.

Why That Structure, For That Job

Structure explained as an answer to a problem.

Prompt

Explain how the structure of [a biological structure] makes its function possible — the specific physical or chemical features and what each one buys. Then describe what a badly designed version would fail to do.