The molecular formula H2O means
A. 1 hydrogen atom and 1 oxygen atom.
B. 1 hydrogen atom and 2 oxygen atoms.
C. 2 hydrogen atoms and 2 oxygen atoms.
D. 2 hydrogen atoms and 1 oxygen atom.
E. None of the choices are correct.
Answer: D
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Which of the following are common disorders of the axial skeleton? Select all that apply.
_____ Cleft palate _____ Spondylosis _____ Medial epicondylitis _____ Spinal stenosis _____ Gouty arthritis
Why do human beings lose height as they reach old age?
What will be an ideal response?
An experiment shows that your plasma contains anti-B antibodies and anti-D antibodies. What type of blood do you have?
A) B positive B) B negative C) A negative D) A positive
Umbilical arteries:
A. deliver oxygen and nutrient-rich blood from the mother to the placenta. B. deliver oxygen and nutrient-rich blood from the fetus to the placenta. C. carry blood with low oxygen and high metabolic wastes away from the fetus to the placenta. D. carry highly oxygenated blood from the placenta to the fetus. E. carry blood with low oxygen and high metabolic wastes from the placenta to the mother's circulation.