How many milk teeth do human beings typically have?
A. 20
B. 28
C. 32
D. 16
Correct Answer: A (20)
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A. 20
B. 28
C. 32
D. 16
A. 10 pairs
B. 12 pairs
C. 14 pairs
D. 16 pairs
A. Lungs
B. Liver
C. Eyes
D. Heart
A. Transport oxygen
B. Clot blood
C. Fight infection
D. All of the above
A. Weaker muscles
B. Shifting of the iris
C. Elongation of eyeballs
D. Weakening of the retina
A. Liver
B. Brain
C. Skin
D. Bone
A. Muscle
B. Neuron
C. Blood cell
D. Tissue