What is the legal test for reversal of a jury's verdict for insufficient evidence in a sexual assault case?

"'In reviewing the sufficiency of evidence under the due process clause of the Fourteenth Amendment to the United States Constitution, the question we ask is "whether, after viewing the evidence in the light most favorable to the prosecution, any rational trier of fact could have found the essential elements of the crime beyond a reasonable doubt."' [Citations.] We apply an identical standard under the California Constitution. [Citation.] 'In determining whether a reasonable trier of fact could have found defendant guilty beyond a reasonable doubt, the appellate court "must view the evidence in a light most favorable to respondent and presume in support of the judgment the existence of every fact the trier could reasonably deduce from the evidence."' [Citation.]" (People v. Young (2005) 34 Cal.4th 1149, 1175.)

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When reviewing the sufficiency of the evidence, "a reviewing court resolves neither credibility issues nor evidentiary conflicts. [Citation.] Resolution of conflicts and inconsistencies in the testimony is the exclusive province of the trier of fact. [Citation.] Moreover, unless the testimony is physically impossible or inherently improbable, testimony of a single witness is sufficient to support a conviction." (People v. Young, supra, 34 Cal.4th at p. 1181.) A reversal for insufficient evidence "is unwarranted unless it appears 'that upon no hypothesis whatever is there sufficient substantial evidence to support'" the jury's verdict. (People v. Bolin (1998) 18 Cal.4th 297, 331.)