Which of the following extraembryonic membranes
forms fingerlike projections that become part of the
placenta?
a. amnion
b. yolk sac
c. chorion
d. allantois
e. none of these
Answer: c
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One plasma cell will secrete antibodies of various classes, but the antibodies will all have the same specificity.
Answer the following statement true (T) or false (F)
The term "digestion" refers specifically to what?
A) taking food into the mouth B) chewing food C) breakdown of food into smaller pieces, either mechanically or chemically D) muscular contractions that move food through the digestive tract
Bacterial cells that are variable in shape are called ________.
A. hyphal B. coccobacilli C. pleomorphic D. vibrio
Strongyloides stercoralis
A. can cause a fatal disseminated disease in immunosuppressed patients. B. rarely causes chronic infection. C. is ingested with food and does not migrate out of the intestine. D. is a tapeworm. E. All of the choices are correct.