The embryo is most sensitive to outside influences that can cause malformations during the
A. first two weeks after fertilization.
B. twenty-first to twenty-sixth weeks of development.
C. ninth to the sixteenth weeks of development.
D. twelfth to the twentieth weeks of development.
E. third to the ninth weeks of development.
Answer: E
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Which of the following events occur during metaphase?
A) Microtubules form the spindle apparatus. B) Daughter chromosomes move toward the opposite ends of the cell. C) Chromosomes align at the equator of the cell. D) Centrioles move apart. E) All of the answers are correct.
When water is lost from the ECF but electrolytes are retained,
a. both ECF and ICF become more dilute b. osmosis moves water from the ICF to the ECF c. the osmolarity of the ECF drops d. there is an increase in the volume of the ICF e. water levels remain the same
Which of the following bones is paired?
A. Mandible B. Vomer C. Sphenoid D. Occipital E. Temporal
Which of the following joints is formed by the humerus and the ulna?
A) Ball-and-socket joint B) Hinge joint C) Saddle joint D) Gliding joint