Erythroblastosis fetalis may occur in
A. a second Rh-negative fetus developing in an Rh-negative woman.
B. a first Rh-positive fetus developing in an Rh-negative woman.
C. a first Rh-negative fetus developing in an Rh-negative woman.
D. a second Rh-positive fetus developing in an Rh-negative woman.
Answer: D
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The small bones in the mammalian middle ear are called:
A) Malleus, incus, stapes. B) Stapes, ossicle, tectorus. C) Malleus, otolith, statocyst. D) Utricle, saccule, ampulla.
Protection for the interior surface of the stomach against the acids and enzymes in the gastric lumen is afforded by
A) the carpet of mucus secreted by the columnar epithelium lining all portions of the stomach. B) the shallow depressions called gastric pits. C) the rapid rate of mechanical mixing of the stomach contents, which exposes the lining to chyme for only a short time. D) the esophageal sphincter. E) None of the answers are correct.
Describe the events associated with fertilization and early development
What will be an ideal response?
Which of the following is an example of a nonspecific immune defense??
A) ?Inoculation B) ?Skin C) ?Antibody D) ?Antigen