Which of the following elements is found in all organic molecules?
A) nitrogen
B) oxygen
C) iron
D) carbon
E) copper
D) carbon
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The clavicle is part of the ________ skeleton.
A. appendicular B. axial
The bones of the arms and legs are classified as:
A) flat bones. B) irregular bones. C) long bones. D) short bones.
What causes RDS (respiratory distress syndrome) in premature babies?
A. Muscles associated with respiration are not strong enough to expand the thorax. B. Respiratory centers of the brain are not functional until late in the fetal stage. C. The lungs have not yet produced adequate numbers of alveoli for efficient gas exchange. D. There is insufficient production of surfactant. E. Bronchioles are constricted due to excess production of mucus.
The parts of an atom that carry single negative electrical charges are called
________. Fill in the blank(s) with correct word