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.
Maize kernel structure. The mature maize kernel consists of multiple tissues and organs within the embryo and endosperm, in addition to maternally derived structures. © 2013 Encyclopedia Britannica, Inc., modified image. (RAM: root apical meristem; SAM: shoot apical meristem).
