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These terms define your current search. Click the × to remove a term. Biological Sciences: zoology > animal anatomy > reproductive system > male reproductive system > ductus deferens × 6 items, grouped by Insects and Entomology (view ungrouped items) insect biology (1)    (Click to View) Spermatogenesis, changes in reproductive structures, and time constraint associated with insemination in Podisus nigrispinus Journal of insect physiology