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Biochemical analysis of the cytosol fraction isolated from the ovotestis/spermatheca glands of marine mollusc Telescopium telescopium and it’s sperm microtubular structure revealed that relatively similar biomolecules like different enzymes, hormones, minerals and structures of the sperm are also exist in humans. Moreover, antiserum of the cytosol fraction was found to crossreact with the human sperm antigen indicated presence of a common sperm surface antigenicity between these two diversified species. These findings might support and/or hypothesize about the origin and diversification of the vertebrate molecules from its ancestral form (s) from the invertebrates, and basic physiological functions of these ancestral biomolecules including some of the cellular structures plausibly remain the same regardless their structural changes even after evolution.