An official website of the United States government
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
A wheat grain is made up mostly of starchy endosperm. In this close-up, the extruded endosperm appears as a whitish mass at the tip of the grain in the center of the head.