Question
Bull semen is stored in
liquid carbon dioxide
liquid oxygen
liquid nitrogen
ice
Solution
C.
liquid nitrogen
Semen is stored in semen banks for artificial insemination or artificial breeding, eg, Bull's semen is stored at -196oC temperature. This temeperature is obtained by liquid nitrogen.
Deep freezing is used for keeping seven day old embryos for several years. Deep freezing is also done at -196oC.
