Scientific Concepts


foundation foundation embedded foundation species foundation structure foundational assumption foundational elements foundational principles founder effect founder effects founder events founder mutation founder population	founders founding founding father founding member founding population founding queens foundress number foundry workers four-cell stage four-chamber view four-chambered heart four-circle diffractometer four-factor model	four-factor solution four-fold increase four-helix bundle four-leaf stage four-membered chelate ring four-membered rings four-month period four-point scale four-probe method four-step synthesis four-wave mixing four-week period four-year period	fourfold fourfold increase fourfold reduction fourteenth century fourth fourth case fourth century ad fourth day fourth decade fourth digit fourth experiment fourth finger fourth generation	fourth grade fourth graders fourth group fourth leading cause fourth month fourth order fourth patient fourth postoperative day