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), vegetative female gametophyte (left, asterisk) and fertile male gametophyte (right). Arrow shows antheridium. (b), Fertile female gametophyte (asterisk) and young sporophyte (embryos). Arrow shows zygote. (c), Fertile gametophyte (asterisk) with young sporophyte (arrow). [Photographs by H. Kawai].
