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.
Seed architectures. Diagrammatic representation in longitudinal sections of pine (gymnosperm) (a), Arabidopsis (angiosperm, endospermic) (b), rice (angiosperm, endospermic) (c), and quinoa (angiosperm, perispermic) (d) seeds right after fertilization and at an early embryogenesis stage. The figure is not in scale. Female gametophyte, nucellus, endosperm, and embryo are highlighted in violet, orange, blue, and yellow, respectively
