Which of the following statements about the syncytiotrophoblast is false?
A. It invades the maternal tissues that compose the endometrium of the uterus.
B. It is nonantigenic, so that it triggers no immune response.
C. It forms the developing embryo.
D. It forms lacunae.
E. It is composed of a nondividing, multinucleated cell.
Answer: C
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Which of the following is formed by intramembranous ossification?
A) roof of the skull B) carpal bones C) femur D) clavicle E) the roof of the skull and the clavicle
Match the following systems to their functions:
A) Lymphatic B) Cardiovascular C) Immune D) Endocrine 1) Controls the body with chemical molecules called hormones. 2) Delivers oxygen and nutrients to the tissues. 3) Produces antibodies that neutralize foreign substances. 4) Removes and filters excess fluid from tissues.
Which of the following animals is a mollusk?
a. oyster c. crab b. shrimp d. lobster
Summarize the differences between intramembranous and endochondral ossification
What will be an ideal response?