The number of chromosomes in a normal ovum is 23.

Which one of the following is true concerning Marijuana use?

Which one of the following is a right-to-left congenital cardiac shunt?

A 63-year-old male, with a past medical history significant for Parkinson disease, presents to the dermatology clinic for evaluation of new onset skin irritation. Examination reveals oily, scaly, red patches (with adherent white flakes), worst between his eyebrows, behind his ears, and along his nasolabial folds. Which of the following diseases is the most likely explanation for these findings?

Which one of the following is true about the carrier state of hepatitis infection?

Most spontaneous bleeding into brain tissue occurs in patients with hypertension.

Which one of the following is the most common malignant tumor of skin?

Arrhythmias are mechanically inefficient because of which one of the following reasons?

Which one of the following causes the most deaths annually in the United States?

Which one of the following is the most common benign soft tissue tumor in adults?