M.А. Karapetyan - Ph.D. (Biol.), Associate Professor, Department of Biology, Erevan State University. E-mail: marietta_karapetyan@yahoo.com R.Sh. Sargsyan - Dr.Sc. (Biol.), Head of Laboratory, Integrative Biology in Orbeli-s Institute of Physiology of NAS of Armenia, Yerevan. N.Yu. Adamyan - Ph.D. (Biol.), Associate Professor, Department of Biology, Erevan State University. E-mail: nona01011966@mail.ru