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.
Hydra vulgaris and H. viridissima survival under starvation. The white column represents the symbiotic state and the black column the aposymbiotic state; the bar indicates the standard deviation, n indicates the number of independent experiments conducted.
