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.
Examples of the examined pollen grains. (A) viable pollen grain extends its pollen tube, (B) viable pollen grain against non-viable pollen, (C) showing viable pollen in different size (the normal size of pollen versus smaller size that recorded in Masr 2 variety), and (D) three forms detected of pollen viability; viable, less viable.
