source organ造句

They sought to determine the source organ of whatever non-pregnant urine substance was causing the same bitterling ovipositor response as Fleischmann's estrogenic preparation.
Plants require potassium ions ( K + ) for protein synthesis and for the opening and closing of stomata, which is regulated by proton pumps to make surrounding guard cells either source organs, and maintenance of cation : anion balance in the cytosol and vacuole.
It's difficult to find source organ in a sentence. 用source organ造句挺难的