Which of the following elements combine to form nonpolar covalent bonds?
A) carbon and chlorine
B) carbon and hydrogen
C) hydrogen and oxygen
D) nitrogen and hydrogen
E) sodium and chlorine
B) carbon and hydrogen
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Which of these substances could be driven across a membrane by the resting membrane potential?
A) H2O B) O2 C) glucose D) Na+ E) CO2
A blastocyst is a(n)
A) extraembryonic membrane. B) solid ball of cells. C) hollow ball of cells. D) portion of the placenta. E) origin of the urinary bladder.
Which statement regarding the dentition of pigs and humans is correct?
A) Pigs and humans have the same number of teeth. B) Pigs have fewer teeth than humans do. C) Pigs have more teeth than humans do.
Hypercalcemia is rare, but hypocalcemia can result from a wide variety of conditions.
Answer the following statement true (T) or false (F)