Some estimates claim that approximately ________ percent of all pregnancies result in spontaneous abortion, many due to chromosomal abnormalities.

A. 50
B. 40
C. 20
D. 30
E. 10


Answer: A

Anatomy & Physiology

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There are many different antigens found on red blood cell membranes, but only antigens A and B, and the Rh antigens are likely to cause agglutination reactions when transplanted into a person that lacks them.

Answer the following statement true (T) or false (F)

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Define organs

What will be an ideal response?

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The masseter and temporalis muscles provide much of the force for:

A) chewing. B) swallowing. C) smiling. D) frowning.

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The ________ carry blood toward the lungs.

A. pulmonary trunk and arteries B. pulmonary arteries and veins C. superior and inferior venae cavae D. aorta and pulmonary arteries E. pulmonary trunk and veins

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