[Solved] Each is true of the calcium-to-phosphorus ratio,except one.Which is the exception? A) Serum (blood) calcium is relatively constant. B) Each cell has a vital need for calcium. C) Calcium imbalance occurs when calcium withdrawal from bones exceed deposits. D) Decreased bone density caused by insufficient calcium occurs rapidly. Sex Characteristics: The physical or physiological features, including reproductive organs, that distinguish male and female organisms. Malicious Use: The intentional misuse of something, typically technology or information, with the intent to cause harm. Sexual Photos: Images that depict sexual acts, nudity, or erotic subject matter, often used in the context of adult entertainment or personal exchanges. Teenage Mothers: Young women who become mothers during their teenage years, facing unique social, economic, and health challenges.